In Nigeria , abducting scores of girls from school isn't sshocking

The heavily armed militants stormed the girls dormitory in the middle of the night, hearding more than 200 students on to vehicles and burning down nearly buildings as they made their escape.

That was a week ago Monday.

Of the 230 students abducted from the Goverment Girls Secondary School in the Nigerian town of Chibok, about 190 are still missing, one official said.

The number of girls taken from the school has been revised by officials several times, and on Monday, who said a new figure of at least 230 was determined after reviewing records and taking reports from parents.

Isa Umar Gusau, a spokesman for the Borno provincial governor's office, put the number at 234 - 129 science students and 105 art students.