Dhaka, July 27 -- Islamic State-backed rebels killed 38 people on Sunday in an attack on a church in eastern Congo, city officials said.

The assault in Komanda, a city in the northeastern Democratic Republic of Congo, is believed to have been carried out by ADF rebels, wielding guns and machetes, officials told Reuters.

Jean Kato, an official in the city administration, said worshippers were taking part in a night mass when the rebels stormed the church in the early hours of Sunday morning.

Thirty-eight people were dead, 15 injured and several others were still missing, officials said.

Christophe Munyanderu, a human rights activist present at the scene in Komanda, said shots were heard overnight but people at first thought it was thie...