Police used tear gas Saturday in Chiapas against members of the one caravan in Mexico whose destination is not the United States. The caravan — made up of as many as 500 displaced indigenous people — had been marching from San Cristóbal de las Casas to the capital, Tuxtla Gutiérrez, arriving in time for the annual report to the state Congress by Governor Manuel Velasco Coello. Police responded with tear gas when the marchers attempted to enter the building, which triggered a counterattack in which the latter threw rockets, stones and other projectiles at police.