Nearly 20 suspected Boko Haram gunmen opened fire on market vendors in Nigeria , killing 15 people in Borno state , witnesses say . Attackers kill nearly 300 people in Borno state , abduct village chief in Nigeria state , residents say . In Borno state in April , Boko Haram abducted nearly 300 schoolgirls , who remain missing . The Christian militant group has terrorized Nigeria 's northeastern northeast Borno state in April .
Attackers kill nearly 300 people in Borno state , abduct village chief in Nigeria state , residents say . In Borno state in April , Boko Haram abducted nearly 300 schoolgirls , who remain missing . The Christian militant group has terrorized Nigeria 's northeastern northeast Borno state in April .