At least 50 Nigerian schoolgirls are still missing after an attack on a boarding school by Boko Haram jihadists, the local governor says.
Militants raided their school on Monday evening, but many of the students and staff had fled before they arrived.
It was initially thought that the girls had escaped but two days later, their whereabouts are still not known.
The attack comes four years after Boko Haram kidnapped more than 270 girls from a school in the town of Chibok.
That triggered a global campaign to try and rescue the so-called Chibok girls.
The latest attack was in Dapchi, Yobe state, about 275 km (170 miles) north-west of Chibok.
Locals living near the school told the BBC that about half the girls who had fled have been found after hiding in surrounding villages.
Officials are not calling this a kidnapping, and say many of the girls and teachers ran into the bush and may be found.
However, some parents say more than 51 girls are still missing.
One father told the BBC that about 93 girls were still unaccounted for, while another parent said they had seen a truck full of students being taken away.
The security services are said to be combing the surrounding area to find the missing girls.
Some residents and civilian militia in Dapchi said they believed the jihadists had planned to kidnap schoolgirls in their town too, AFP news agency reports.
But a teacher at the school told the BBC the militants were only interested in looting, and left with food some three hours later.
They had also looted a shop, one resident said.
The jihadists came into the town, firing guns and letting off explosives, causing students and teachers to flee into the surrounding bush.
They say that Nigeria’s security forces – backed by military jets – later repelled the attack.
The school has been shut, and is being guarded by troops.