The number of undocumented migrants reaching the US-Mexico border has hit the highest level in more than 20 years in the latest sign of the humanitarian crisis facing the Biden administration.

US Customs and Border Protection (CBP) said it caught 180,034 migrants, mostly single adults, in May.

The number was up slightly from 178,854 in April and 172,000 in March.

It was the biggest monthly total since April 2000 with increasing numbers coming from outside Central America.

This includes countries like Ecuador, Venezuela, Cuba, Haiti and even some African nations.