More anti-terrorism U.S. Marines have been dispatched to Haiti to beef up security at the American embassy 24 hours after the country's prime minister announced his resignation amid mounting chaos.

The elite Fleet Anti-terrorism Security Team (F.A.S.T) was sent in as bedlam continued and after top gang leader Jimmy 'Barbecue' Cherizier called for a 'bloody revolution'.

Ariel Henry stepped down as prime minister on Tuesday as the Caribbean nation was pushed to the brink of civil war and bodies were left strewn in the streets.