A train derailed in a densely populated Mexico City suburb on Thursday morning, killing at least five people, local authorities said.

The train, which was transporting grain, crashed in Ecatepec, a large municipality in the State of Mexico that forms part of the urban sprawl extending from the capital.

After the train ran off the tracks shortly before 6 a.m., one of its cars careened into a residential area, killing five people, the Communications and Transportation Ministry said in a statement.

Authorities are in the process of removing debris from the house, and more victims will probably be found, the State of Mexico prosecutor¡¯s office said.

The train belonged to Kansas City Southern¡¯s Mexican unit, the ministry said. The company did not immediately respond to a request for comment.

The Mexican regulator for railway transport will investigate the accident, the ministry said.

¡°The government of Ecatepec sends its deepest condolences to the families of the victims and reiterates its support in this difficult moment,¡± Indalecio Rios, mayor of Ecatepec, wrote in a post on Twitter.