Security fears rise in Nigeria after more than 300 schoolchildren kidnapped

Christian group revises up number of students and teachers missing after one of country's largest mass abduction

Gunmen have kidnapped more than 300 students and teachers in one of the largest mass kidnappings in Nigeria, a Christian group said on Saturday, as security fears mounted in Africa's most populous nation.

The early Friday raid on St Mary's co-educational school in Niger state in western Nigeria came after gunmen on Monday stormed a secondary school in neighbouring Kebbi state, abducting 25 girls.