An attack on an Iranian police convoy on Saturday in the country’s restive southern province of Sistan and Baluchestan killed at least 10 officers, authorities said.

Details remain scarce over the attack in Gohar Kuh, some 1,200 kilometres southeast of the Iranian capital, Tehran.

Initially, reports simply described an attack by “miscreants” without more information. But shortly after, Iranian state media said 10 officers had been killed.

HalVash, an advocacy group for the Baluch people of Afghanistan, Iran and Pakistan, posted photos and video of what appeared to be a disabled truck painted with the green stripe used by Iranian police vehicles. One photo shared by the group showed what appeared to be the corpses of two police officers in the front seat of the truck.

HalVash said the attack appeared to target two security force vehicles and all those riding in them were killed. The truck appeared to have only damage from bullets, rather than any explosive being used.