Panama has halted Doctors Without Borders (MSF) from providing medical aid to migrants traversing the perilous Darién Gap, a critical border crossing connecting Colombia and Panama.

Even cities quite a distance from the Mexican border are feeling the effects of the surge in migrants.

While thousands of migrants illegally enter the US each day, over 11,000 people remain in shelters and camps on the Mexican side of the border, according to community leaders.

At least 79 migrants have drowned, and hundreds more are missing and feared dead after their overloaded boat capsized and sank off the coast of Greece.