Relatives of the victims of a bus crash in eastern Mexico are identifying their loved ones Tuesday, one day after the crash that claimed 57 lives.

Distraught relatives traveled to a makeshift morgue in Maltrata, near where the overcrowded bus crashed through a metal barrier and plunged 200 meters down a ravine.

Three people survived the crash, which happened on a steep highway linking Mexico City and the port city of Veracruz.

Officials say all of the dead were Mexican tourists. Investigators are looking into whether mechanical failure or driver negligence played a role in the crash.

The accident took place as millions of Mexicans filled the highways to return home from Easter festivities on Sunday and Monday.