TECUN UMAN, Guatemala (AP) — The Latest on a caravan of Central American migrants hoping to reach the United States (all times local):

7 a.m.

Participants in a 3,000-strong migrant caravan heading toward the United States have gathered in a park to wait a few more hours for members of the group who are still arriving.

The migrants have agreed that they will begin their journey to the border crossing between Guatemala and Mexico around 11 a.m. local time.

Some plan to make a valley-like formation, with men walking to the sides and women and children walking in the middle. Others intend to cross the Suchiate River on a raft.

The exhausted travelers are mostly from Honduras, but migrants from other Central American countries have joined the caravan.

Jonathan Guzman, a 22-year-old from El Salvador, said he had dreams of working in construction in Los Angeles.

"It's the third time that I'm trying to cross," he said.

As the sun rose, a military helicopter could be seen overhead, foreshadowing the difficulties that migrants will have as they try to reach the U.S.