Large migrant caravan sets off for US from southern Mexico

MEXICO CITY (Reuters) - A large migrant caravan comprising many Central Americans and Venezuelans left southern Mexico on Monday for the United States, organizers and officials said, as Washington grapples with renewed pressure on its southern border.

Officials in the southern state of Chiapas said some 3,500 people set off on foot from the city of Tapachula near the Guatemalan border, while one of the caravan's organizers, Irineo Mujica, said there were around 5,000 in the group.