Four of the more than 200 Nigerian schoolgirls kidnapped by the militant Islamist sect Boko Haram in Cameroon have escaped, raising hopes for the young prisoners still held captive, according to a report.

The free girls, all aged between 16 and 18, escaped with the help of a teenage boy prisoner, who managed to get them out of the camp, according to Stephen Davis, a British-Australian negotiator who had tried to bargain with the extremist Islamic group for the schoolgirls' freedom.

The girls, guided by the setting sun, walked west for three weeks, finally arriving in a Nigerian village, starving and traumatized.

"They were amazing ? to first escape and then walk for weeks," Davis told The Times of London. "They are the only ones that have escaped from a Boko Haram camp."

This was according to report gotten from NYPost.