TEHRAN (Press Shia Agency) – Thousands of Honduran migrants and refugees continue fleeing the Central American nation.

An initial caravan left the country one week ago, crossed into Guatemala on Monday, and has since dispersed into waves, as thousands more travel north to join them.

Thousands of them made it to the Mexican border on Friday. Some have been swimming and rafting across into Mexico. Most were stopped before entering and have been taken to shelters while they await processing one group at a time, which may take days.

Mexico, Guatemala and Honduras have been fortifying their borders all week, sending reinforcements to beef up the presence of security forces. Mexico erected fencing at the Tecun Uman border crossing with Guatemala. Honduran police and riot police have been stopping people from leaving. Guatemalan police have set up checkpoints to stop people from advancing, Al-Jazeera reported.

The additional security measures come as US President Donald Trump continues to ramp up pressure on governments in the region to halt the caravan before it hits the southern US border, which Trump has threatened to shut down. He has also threatened to cut aid to Honduras, Guatemala and El Salvador.