Ghalib Mujahid, governor of the Achin district, said on today that four men from each side had been decapitated after being caught by the opposing side during battles yesterday.
During a fight with gunmen affiliated with the IS, he says, four members of a militia loyal to Zahir Qadir, deputy speaker of parliament, were taken hostage and beheaded.
In revenge, four of five IS gunmen held by Qadir's militia were beheaded, he says. Their heads were placed on stones along a main road through Achin, he says.