This is the second time in as many weeks the UN has fired on gunmen moving toward the central city.
In a statement, MINUSCA said that it had spotted about 40 fighters from the Popular Front for the Renaissance of the Central African Republic (FPRC), "heavily armed with AK47s and RPGs (rocket propelled grenades)" yesterday morning a few kilometres north of Bambari.
It remained unclear whether the airstrikes resulted in any casualties, though the mission alerted the International Red Cross for any possible injuries, a MINUSCA spokesman told AFP.
The two factions have been fighting for control of taxes levied on Fulani herders during the current seasonal migration.
More From This Section
On Tuesday, MINUSCA said four of its officers were injured by FPRC fighters in the village of Ippy, about 100 kilometres (62 miles) northwest of Bambari.
On the weekend of February 11, UN attack helicopters opened fire on about 300 men advancing on Bambari in pickup trucks mounted with machine guns.
Following the offensive, the UN Security Council "urged the armed groups to immediately halt the fighting and join the peace and reconciliation dialogue".