Some 1.4 million Haitians are on the brink of famine and more than 4 million need food assistance, aid groups say. Authorities are trying to get food, water and medicine to makeshift shelters and elsewhere as gang violence chokes life in Port-au-Prince and elsewhere.

More than 200 gangs are believed to operate in Haiti, of which almost two dozen are in the capital and 80% of the territory around the city. Prime Minister Ariel Henry to announce early Tuesday that he will resign as soon as a transition council is created.