Migrant caravan demands transport as 2nd group enters Mexico By CHRISTOPHER SHERMAN and SANTIAGO BILLY, Associated Press NILTEPEC, Mexico (AP) — More than 1,000 migrants in a second caravan that forged its way across the river from Guatemala began walking through southern Mexico on Tuesday and reached the city of Tapachula — some 250 miles behind a larger group and more than 1,000 miles from the closest