(Reuters) - The organizer of a caravan of hundreds of migrants traveling north on foot from Honduras was detained Tuesday morning in Guatemala, according to a Reuters witness.

Three Guatemalan police officers zeroed in on Bartolo Fuentes, a former lawmaker in the Honduran Congress, detaining him from the midst of a crowd of several hundred people that he and three other Hondurans had led from San Pedro Sula, Honduras, since Saturday, bound for Mexico.