Boko Haram, a Nigerian militant group, made international headlines in 2014 when they abducted 276 schoolgirls from a school in Chibok, Nigeria, sparking a global campaign to #BringBackOurGirls.

Now, four years later, in a chilling repetition dozens of schoolgirls have been abducted from a boarding school in the village of Dapchi in Nigeria.

Heavily armed insurgents attacked the village on Monday as they entered on camouflaged trucks, according to witnesses. But accounts of the girls’ current whereabouts vary greatly.

Several parents and a government official said that the Nigerian military had rescued 76 schoolgirls and the dead bodies of 2, leaving 13 unaccounted for. But the local government of Yobe, where the abduction took place, released a statement saying 50 remained accounted for.

The Nigerian president, Muhammadu Buhari, has since taken to Twitter to assure the public that suitable action is being taken.

“I have directed the military and police to mobilise immediately to ensure that all the missing girls … are found,” Muhammadu Buhari posted on Wednesday night, two days after the attack. “I share the anguish of all the parents and guardians of the girls that remain unaccounted for.”

Dozens of girls are feared missing after Boko Haram attack