ABUJA, July 4 (Xinhua) -- Jihadist groups have killed 28 people in two separate attacks in northern Nigeria, media reported on Thursday, citing the military and residents.

Militants from the jihadist group Lakurawa raided a village in Nigeria's northwestern Sokoto state on Wednesday, killing 17 people, residents said. The attackers stormed the village, "shooting indiscriminately" in what locals believe was a reprisal for the killing of three jihadists by vigilantes in a failed raid on the community days earlier.

Another 11 were killed Thursday when jihadists from Islamic State West Africa Province attacked the border town of Malam Fatori and opened fire on a camp for internally displaced people, said Lieutenant Colonel Olaniyi Osoba of the Multinational Joint Task Force, a multinational military coalition fighting jihadists in the region.

Osoba said 20 others were wounded and taken to a hospital in Bosso across the border in Niger.

According to the United Nations, jihadist violence has killed over 40,000 people and displaced around 2 million in northeastern Nigeria since 2009. ■