Due to pilot error, a Soviet-era Antonov-24 aircraft carrying thirty passengers made an emergency landing on a frozen river on Thursday near an airport in the far east of Russia, according to transport prosecutors.

According to the prosecutors, the Polar Airlines An-24 landed safely on the Kolyma River close to Zyryanka in the Yakutia region.

“According to preliminary information, the cause of the aviation incident was an error by the crew in piloting the aircraft,” a spokesperson for the Eastern Siberian transport prosecutor said in a statement.

The prosecution released photographs of the aircraft on a frozen river. Images of the passengers getting off were published in the newspaper Izvestia.

“The An-24 aircraft landed outside of the runway of the Zyryanka airport,” Polar Airlines said in a short statement.

“There were no casualties,” it said.