TIJUANA, Mexico (AP) — The Central American migrant caravan that became a key midterm campaign issue received helped from a group of activists that's now coming under criticism from former allies and some of the immigrants themselves.

Pueblo Sin Fronteras rejects the criticism that it misled participants about how long they would have to wait on the Mexican side to apply for asylum. Organizers say their commitment was protecting the immigrants and giving them as much information as possible about the trek from Central America to the U.S.

Thousands of caravan members are now in Tijuana waiting to get into the U.S.

Pueblo Sin Fronteras played an essential role: It helped charter the route, arrange bus transportation and negotiate with Mexican officials to provide protection. It also raised more than $46,000 online for emergency housing and food.