Haitian forces working with police sent from Kenya have launched a joint operation to oust criminal gangs from one of the roughest neighborhoods of Haiti’s capital, Prime Minister Garry Conille said Wednesday.

Conille spoke at a hospital in Port-au-Prince where three Haitian policemen were recuperating after being injured in a shootout Tuesday during the joint operation in the impoverished and gang-controlled neighborhood of Bel Air.

More than 3,200 killings have been reported in Haiti from January to May. Gangs that control 80% of Port-au-Prince have left more than half a million people homeless in recent years as they fight to control more territory.