An armed group in Nigeria has attacked another school and abducted 15 children in the third mass kidnapping incident in a fortnight, police said on Sunday. The heavily armed assailants broke into a school dormitory in the state of Sokoto on Saturday morning. As well as the children, a woman from the village of Gidan Bakuso was also taken away, according to police spokesman Ahmad Rufa’i. The police only found out about the kidnapping hours later as the village is in a remote area with no mobile phone service or paved roads, the spokesman said. The village was therefore not accessible by car, bu…