A train derailed in northeastern Thailand on Wednesday after a construction crane fell on three of its carriages, killing at least 25 people and injuring about 80, police said.

The accident took place on Wednesday morning in the Sikhio district of Nakhon Ratchasima province, 230 km (143 miles) northeast of Bangkok, on a train from the capital bound for Ubon Ratchathani province.

“The death toll has now reached 25. The search for more bodies is ongoing,” Police Colonel Thatchapon Chinnawong told Reuters by phone.

Transport Minister Phiphat Ratchakitprakarn said in a statement that there were 195 people on board, adding that he had ordered a thorough investigation to be carried out.

Those killed were in two of the three carriages hit by the crane, he said.

The crane was working on a high-speed rail project when it collapsed and hit the passing train, causing it to derail and briefly catch fire.

Images shared by the ministry showed carriages overturned next to shrubland and firefighters extinguishing a blaze as smoke billowed out.

Footage of the crash site verified by Reuters shows rescue workers trying to extract casualties from one of the buckled carriages, with some badly injured passengers already being loaded into ambulances.

The elevated high-speed rail project, one of several under construction in Thailand, was being built above the existing rail line. Part of the collapsed crane is still propped up by the stanchions built to support the new rail link.

Chinese Foreign Ministry spokesperson Mao Ning said at a press briefing that the Chinese government attached great importance to the safety of projects and personnel and was looking into the situation.

“At present, it seems that the relevant section was under construction by a Thai enterprise. The cause of the accident is still under investigation.”

The high-speed rail project will connect to China through Laos. The government said last year that more than a third of construction had been completed in the segment connecting Bangkok to Nakhon Ratchasima, and the whole line to Nong Khai at the border with Laos would be ready by 2030.