At least 10 migrants were killed and about 15 injured when the cargo truck they were traveling in crashed on a highway in southern Mexico near the border with Guatemala.

The incident is the latest in a series of migrant deaths in Mexico as the number of migrants traveling toward the U.S. border continues to rise.

The Chiapas state civil defense office said Sunday’s truck accident happened on a highway near the town of Bijiapan, about 110 miles (175 kilometers) from the Guatemalan border.

The office released photos showing a pickup truck tipped over on its side with an open cargo box and victims lying on the side of the highway.

The office did not confirm the nationalities of the victims, but a prosecutor’s office employee said most of them were Cuban immigrants who had been run over by cars. The employee is not authorized to speak.

It is also unclear how many of the 15 victims were immigrants. No immediate information was available on their condition or their nationalities.

Mexican authorities typically prohibit undocumented immigrants from boarding buses, so those who don’t have the money to hire smugglers often walk on the sides of highways and ride in passing trucks.

There have been several deaths among migrants in the past week.
An immigrant from Ecuador died and 10 others from Colombia and Guatemala were injured Saturday while being transported for processing in a truck operated by a Mexican immigration agency.

Mexico’s National Migration Agency said the truck crashed into the bus in the city of Mexicali, across the border from Calexico, California.