Train traffic resumed early Saturday in an eastern Iowa city a day after a derailment sent more than a dozen freight cars and tankers off the tracks just yards from the Mississippi River.

The LeClaire Fire Department said in a news release that all derailed cars had been moved away from the main track and would be hauled away by tractor-trailers throughout the day. Canadian Pacific Railroad had found no significant air or water contamination from the Friday morning derailment, officials said.

Officials warned that traffic will remain congested in LeClaire's downtown area as cleanup from the derailment continues.

Emergency crews responded to a train derailment that sent at least a dozen rail cars and tankers off their tracks, the Friday, Jan. 3, 2020 , in downtown LeClaire, Iowa. The derailment, along U.S. Highway 67, just a couple of hundred feet from the banks of the Mississippi River, forced police to send a hazardous materials team to the site. (Kevin E. SchmidtQuad City Times via AP)

Emergency crews responded to a train derailment that sent at least a dozen rail cars and tankers off their tracks, the Friday, Jan. 3, 2020 , in downtown LeClaire, Iowa. The derailment, along U.S. Highway 67, just a couple of hundred feet from the banks of the Mississippi River, forced police to send a hazardous materials team to the site. (Kevin E. SchmidtQuad City Times via AP)

No one was injured and no buildings were damaged in the derailment, but some vehicles in a nearby parking lot were damaged.

Officials have not said what might have caused the derailment. LeClaire is a city of roughly 3,800 located about 175 miles (281.6 kilometers) east of Des Moines.

Emergency crews responded to a train derailment that sent at least a dozen rail cars and tankers off their tracks, the Friday, Jan. 3, 2020, in downtown LeClaire, Iowa. The derailment, along U.S. Highway 67, just a couple of hundred feet from the banks of the Mississippi River, forced police to send a hazardous materials team to the site. (Kevin E. SchmidtQuad City Times via AP)

Emergency crews responded to a train derailment that sent at least a dozen rail cars and tankers off their tracks, the Friday, Jan. 3, 2020, in downtown LeClaire, Iowa. The derailment, along U.S. Highway 67, just a couple of hundred feet from the banks of the Mississippi River, forced police to send a hazardous materials team to the site. (Kevin E. SchmidtQuad City Times via AP)

 Emergency crews responded to a train derailment that sent at least a dozen rail cars and tankers off their tracks, the Friday, Jan. 3, 2020 , in downtown LeClaire, Iowa. The derailment, along U.S. Highway 67, just a couple of hundred feet from the banks of the Mississippi River, forced police to send a hazardous materials team to the site. (Kevin E. SchmidtQuad City Times via AP)

Emergency crews responded to a train derailment that sent at least a dozen rail cars and tankers off their tracks, the Friday, Jan. 3, 2020 , in downtown LeClaire, Iowa. The derailment, along U.S. Highway 67, just a couple of hundred feet from the banks of the Mississippi River, forced police to send a hazardous materials team to the site. (Kevin E. SchmidtQuad City Times via AP)

 This photo provided by Ryan Burchett of the Mississippi River Drilling Company, shows a train derailment Friday, Jan. 3, 2020, that sent at least a dozen rail cars and tankers off their tracks in downtown LeClaire, Iowa. The derailment forced police to shut down the highway and send a hazardous materials team to the site. (Ryan BurchettMississippi River Drilling Co. via AP)

This photo provided by Ryan Burchett of the Mississippi River Drilling Company, shows a train derailment Friday, Jan. 3, 2020, that sent at least a dozen rail cars and tankers off their tracks in downtown LeClaire, Iowa. The derailment forced police to shut down the highway and send a hazardous materials team to the site. (Ryan BurchettMississippi River Drilling Co. via AP)