At least 23 people, including three children, were killed Tuesday in three separate attacks blamed on jihadists and criminal gangs in northeastern and northwestern Nigeria, according to two security reports.

Suspected Boko Haram jihadists killed 11 people in a raid on a village in northeastern Borno state, while 12 others were killed in attacks on two villages in northwestern Zamfara state, according to two security reports prepared for the United Nations and seen by AFP.