Gunmen kill at least 13 people in northern Nigeria, police say

Gunmen have killed at least 13 people in northern Nigeria, according to police on Wednesday. The attackers began shooting sporadically on Tuesday in Doma village in Katsina state. Investigations are underway to determine the circumstances and identify those responsible. Nigeria faces a complex security crisis, with Islamic militants in the northeast and kidnappings for ransom in the northwest and north-central regions. In a separate attack on Tuesday, armed men killed several people in Kwara state. Local reports put the death toll at over 30. The U.S. has dispatched a small team of military officers to Nigeria.