MEXICO CITY, Mexico (CNN) -- Three people were missing Friday after four vehicles plunged into a river when a bridge collapsed in southeastern Mexico, an official told CNN en Español.
The occupants of the fourth vehicle swam to the riverbank, where they were rescued, said Ranulfo Marquez, secretary of civil protection in the state of Veracruz.
Officials did not give a cause for the bridge collapse. Three of the vehicles were tractor-trailers, the government-run Notimex news agency said.
The bridge spans the Tonala River outside the city of Agua Dulce in the state of Veracruz.