Cameroon’s president announced on Saturday that more than 70 people had been killed and another 600 injured when a passenger train crashed on Friday, reports Reuters.

The packed Camrail train had been traveling from the capital Yaounde to the port city of Douala. It was derailed at around 11 a.m. local time (0600 EDT) near the station in the town of Eseka, 120 km (75 miles) west of the capital, causing carriages to overturn.

“My heartfelt condolences to the bereaved families of the Camrail train derailment in Eseka. Over 70 passengers died and 600 wounded in the accident,” President Paul Biya, who is traveling abroad, wrote on his official Facebook page.

“I instructed the government to provide full assistance to the survivors, while investigations will be made to determine the cause of the derailment.”

Witnesses, including a Reuters reporter traveling on the train, said rail workers had added additional carriages to accommodate extra passengers before its departure, though it is not clear if that decision contributed to the accident.

In a statement from Camrail, a unit of French industrial group Bollore, the company said it was working with Cameroonian authorities to ensure care for those injured and support for the families of victims.

“Technical investigations are under way currently to determine the causes of this dreadful accident and the conclusions, as soon as they are known, will be communicated,” the emailed statement said.

Work began during the night to remove the derailed wagons from the line – one of the main routes for goods and passengers between the main port and the interior.

“The train with wounded and the bodies of victims has arrived at Yaounde station in the presence of government and Camrail officials,” Camrail posted on its official Facebook page earlier on Saturday.

“Buses drove passengers who escaped yesterday’s incident to Douala.”

A Bollore official based in the region, who was not authorized to speak with the press and asked not to be named, said the company was cooperating with authorities examining the crash.

“Camrail has made the train’s conductor and its mechanic available to the judicial police, because in these kinds of circumstances that is the procedure. That will allow for an understanding of what happened,” the official said.