The Boko Haram group is blamed for the deaths of at least 23 people in to separate incidents in north-eastern Nigeria.
Eighteen people were killed when gunmen attacked hunters selling bush meat in Damboa on Monday. Strict Muslims are forbidden to eat monkeys and pig meat.
The BBC reports another five people died on Tuesday when a group of men playing draughts was attacked in Kano.
Damboa is located near the capital of Borno state, Maiduguri, the stronghold of Boko Haram, which was founded there in 2002. Last year, the group was linked to more than 600 killings in its quest for an Islamic state.