MEXICO CITY: At least 18 Mexican tourists died and two dozen were injured when their tourist bus plunged into a ravine in the western state of Nayarit, a local official told AFP on Sunday.

The bus, from a private company, was transporting tourists on a 220-kilometer (136-mile) journey from Guadalajara in the neighboring state of Jalisco to the beach destination of Guayabitos in Nayarit when it went off the road, according to civil protection official Pedro Nunez.

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The cause of the accident late Saturday was not known.

All the passengers were Mexican nationals, said Nunez.