Doomsday cult leader Shoko Asahara and several followers were executed Friday for their roles in a deadly 1995 gas attack on the Tokyo subways and other crimes, Japanese media reported.

FILE - This Nov. 30, 1989, file photo shows Japanese doomsday cult leader Shoko Asahara in Bonn, Germany. Japanese media reports say on Friday, July 6, 2018, Asahara, who has been on death row for masterminding the 1995 deadly Tokyo subway gassing and other crimes, has been executed. He was 63. (AP Photo/Roberto Pfeil, File)

FILE - This Nov. 30, 1989, file photo shows Japanese doomsday cult leader Shoko Asahara in Bonn, Germany. Japanese media reports say on Friday, July 6, 2018, Asahara, who has been on death row for masterminding the 1995 deadly Tokyo subway gassing and other crimes, has been executed. He was 63. (AP Photo/Roberto Pfeil, File)

The top Japanese government spokesman confirmed Asahara's execution but wouldn't comment on the others. Chief Cabinet Secretary Yoshihide Suga said only that the Justice Ministry would make an announcement later Friday.

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FILE - This Nov. 30, 1989, file photo shows Japanese doomsday cult leader Shoko Asahara in Bonn, Germany. Japanese media reports say on Friday, July 6, 2018, Asahara, who has been on death row for masterminding the 1995 deadly Tokyo subway gassing and other crimes, has been executed. He was 63. (AP Photo/Roberto Pfeil, File)

Doomsday cult leader Shoko Asahara and several followers were executed Friday for their roles in a deadly 1995 gas attack on the Tokyo subways and other crimes, Japanese media reported.

FILE - In this Sept. 25, 1995, file photo, Japanese doomsday cult leader Shoko Asahara, center, sits in a police van following an interrogation in Tokyo. Japanese media reports say on Friday, July 6, 2018, Asahara, who has been on death row for masterminding the 1995 deadly Tokyo subway gassing and other crimes, has been executed. He was 63. (Kyodo News via AP, File)

The top Japanese government spokesman confirmed Asahara's execution but wouldn't comment on the others. Chief Cabinet Secretary Yoshihide Suga said only that the Justice Ministry would make an announcement later Friday.

FILE - In this March 20, 1995, file photo, the injured of the deadly gas attack are treated by rescuers near Tsukiji subway station in Tokyo. Japanese media reports say on Friday, July 6, 2018, doomsday cult leader Shoko Asahara, who has been on death row for masterminding the 1995 deadly Tokyo subway gassing and other crimes, has been executed. He was 63. (Kyodo News via AP, File)

The 1995 subway attack was the most audacious. Members of the his Aum Shinrikyo cult punctured plastic bags to release sarin nerve gas inside train cars, killing 13 people and sickening more than 6,000.

FILE - In this undated file photo, cult guru Shoko Asahara, left, of Aum Shinrikyo walks with Yoshihiro Inoue, then a close aid, in Tokyo. Japanese media reports say on Friday, July 6, 2018, Asahara, who has been on death row for masterminding the 1995 deadly Tokyo subway gassing and other crimes, has been executed. He was 63. (Kyodo News via AP)

The cult amassed an arsenal of chemical, biological and conventional weapons to carry out Asahara's escalating criminal orders in anticipation of an apocalyptic showdown with the government.

This February 1995, photo shows facilities of Aum Shinrikyo doomsday cult led by its guru Shoko Asahara in Kamikuishiki at the foot of Mount Fuji, background, Japan. Japanese media reports say on Friday, July 6, 2018, Asahara, who has been on death row for masterminding the 1995 deadly Tokyo subway gassing and other crimes, has been executed. He was 63. (Kyodo News via AP)

This February 1995, photo shows facilities of Aum Shinrikyo doomsday cult led by its guru Shoko Asahara in Kamikuishiki at the foot of Mount Fuji, background, Japan. Japanese media reports say on Friday, July 6, 2018, Asahara, who has been on death row for masterminding the 1995 deadly Tokyo subway gassing and other crimes, has been executed. He was 63. (Kyodo News via AP)

Japanese public broadcaster NHK reported that six followers were also hanged, citing unidentified sources. In all, 12 followers had been on death row with Asahara for the crimes, which killed 27 people. Asahara was 63 years old.

FILE - In this Sept. 25, 1995, file photo, Japanese doomsday cult leader Shoko Asahara, center, sits in a police van following an interrogation in Tokyo. Japanese media reports say on Friday, July 6, 2018, Asahara, who has been on death row for masterminding the 1995 deadly Tokyo subway gassing and other crimes, has been executed. He was 63. (Kyodo News via AP, File)

FILE - In this Sept. 25, 1995, file photo, Japanese doomsday cult leader Shoko Asahara, center, sits in a police van following an interrogation in Tokyo. Japanese media reports say on Friday, July 6, 2018, Asahara, who has been on death row for masterminding the 1995 deadly Tokyo subway gassing and other crimes, has been executed. He was 63. (Kyodo News via AP, File)

The 1995 subway attack was the most audacious. Members of the his Aum Shinrikyo cult punctured plastic bags to release sarin nerve gas inside train cars, killing 13 people and sickening more than 6,000.

Founded in 1984, the cult attracted many young people, even graduates of top universities, whom Asahara hand-picked as close aides.

FILE - In this March 20, 1995, file photo, the injured of the deadly gas attack are treated by rescuers near Tsukiji subway station in Tokyo. Japanese media reports say on Friday, July 6, 2018, doomsday cult leader Shoko Asahara, who has been on death row for masterminding the 1995 deadly Tokyo subway gassing and other crimes, has been executed. He was 63. (Kyodo News via AP, File)

FILE - In this March 20, 1995, file photo, the injured of the deadly gas attack are treated by rescuers near Tsukiji subway station in Tokyo. Japanese media reports say on Friday, July 6, 2018, doomsday cult leader Shoko Asahara, who has been on death row for masterminding the 1995 deadly Tokyo subway gassing and other crimes, has been executed. He was 63. (Kyodo News via AP, File)

The cult amassed an arsenal of chemical, biological and conventional weapons to carry out Asahara's escalating criminal orders in anticipation of an apocalyptic showdown with the government.

The cult claimed 10,000 members in Japan and 30,000 in Russia. It has disbanded, though nearly 2,000 people follow its rituals in three splinter groups, monitored by authorities.

Suga said authorities are taking precautionary measures in case of any retaliation by his followers.

FILE - In this undated file photo, cult guru Shoko Asahara, left, of Aum Shinrikyo walks with Yoshihiro Inoue, then a close aid, in Tokyo. Japanese media reports say on Friday, July 6, 2018, Asahara, who has been on death row for masterminding the 1995 deadly Tokyo subway gassing and other crimes, has been executed. He was 63. (Kyodo News via AP)

FILE - In this undated file photo, cult guru Shoko Asahara, left, of Aum Shinrikyo walks with Yoshihiro Inoue, then a close aid, in Tokyo. Japanese media reports say on Friday, July 6, 2018, Asahara, who has been on death row for masterminding the 1995 deadly Tokyo subway gassing and other crimes, has been executed. He was 63. (Kyodo News via AP)

This February 1995, photo shows facilities of Aum Shinrikyo doomsday cult led by its guru Shoko Asahara in Kamikuishiki at the foot of Mount Fuji, background, Japan. Japanese media reports say on Friday, July 6, 2018, Asahara, who has been on death row for masterminding the 1995 deadly Tokyo subway gassing and other crimes, has been executed. He was 63. (Kyodo News via AP)

This February 1995, photo shows facilities of Aum Shinrikyo doomsday cult led by its guru Shoko Asahara in Kamikuishiki at the foot of Mount Fuji, background, Japan. Japanese media reports say on Friday, July 6, 2018, Asahara, who has been on death row for masterminding the 1995 deadly Tokyo subway gassing and other crimes, has been executed. He was 63. (Kyodo News via AP)