ABUJA, Nigeria—Terrorists have abducted 17 girls in northeast Nigeria, witnesses said Saturday as the West African nation’s military said it “remains resolute in decisively countering the terrorists.” Members of the Boko Haram terrorist group attacked Pemi, a village in the Chibok local government area of Borno state, on Thursday, two residents told The Associated Press. The state is where Boko Haram’s decade-long insurgency against the Nigeria government has been concentrated. In a statement late Friday, the terrorist group also claimed responsibility for killing “many Christians” and setting fire to two churches and several houses during an attack on the Borno town of Bimi. Authorities blame Boko Haram for the killing of tens of thousands of people in Nigeria and neighboring countries in West Africa. The abduction of the girls from Pemi recalled the 2014 kidnapping of 276 schoolgirls in Chibok, a remote town situated 80 miles south of Maiduguri, the …