The police in Burundi say four people were killed in overnight violence in the capital, Bujumbura, as sporadic gunfire and loud explosions continue to echo across the city.

Bujumbura has been hit by violence since April when the president announced he would seek a third term in elections he eventually won.

The president's decision sparked violent street protests. Both opponents and supporters of the president appear to be targeting each other in revenge attacks.

Deputy Police Spokesman Moise Nkurunziza told reporters Sunday that three of the victims of the latest violence died in the northern Bujumbura neighborhood of Ngagara. The other victim was killed in the southern neighborhood of Kanyosha.

The U.N. has cited at least 240 deaths since April, but the real toll is likely much higher.