Two people have died of gunshot wounds in fighting in the capital of Central African Republic, as the sound of fire from machine guns and heavier weapons resounded across Bangui.
Heavily armed members of the former rebel group Seleka took six police officers hostage in Bangui on Sunday, Jean Serge Bokassa, the minister of territorial administration and public security, told Reuters.
It was not clear if the shooting and kidnapping were linked.
The gunfire died down as night fell, witnesses said.
"We demand the liberation of the officers who were taken hostage ... The government will do everything possible to free them," Bokassa said.
Insecurity has persisted in the months since President Faustin-Archange Touadra was sworn in in March, after winning an election intended to draw a line under inter-communal and inter-religious violence that involved the mainly Muslim Seleka and began in 2013.
Medical aid charity Medecins Sans Frontieres will suspend non-essential activity for three days, starting on Wednesday, to protest the killing of one of its drivers in an ambush, its country director said on Monday.
It is the group's second suspension of operations in the country in a little over a month after acts of violence.
Unidentified gunmen shot a MSF driver on Friday on the road between the towns of Sibut and Grimari northeast of Bangui.
Last month, one of its drivers died in a similar incident.
"This (ambush) shows that humanitarian work is becoming more precarious in Central African Republic," head of mission Emmanuel Lampaert told a news conference in Bangui.
"MSF wants its cry for help to be heard."
After the attack in May, MSF said it was forced to suspend activities until it could guarantee the safety of its staff.
It resumed operations a day later.