Some of the schoolgirls Boko Haram kidnapped in mid-April. AP

On Friday, Nigeria's government announced it had reached a deal with Boko Haram to release the approximately 200 schoolgirls held captive by the Islamist terror group since April.

The agreement, announced by the country's defense minister, also involves a cease fire between Boko Haram and Nigeria's military. The government expects the terror group will not back out on the deal. "Commitment among parts of Boko Haram and the military does appear to be genuine," an official with Nigeria's security forces toldReuters Friday. "It is worth taking seriously."

Boko Haram militants abducted more than 300 schoolgirls from Chibok boarding school in northern Nigeria in mid-April, sparking a worldwide outcry and propelling the group onto to the international stage for the first time. Over fifty of the girls escaped early on. The rest have remained in captivity ever since.

Boko Haram, whose name roughly means "Western education is sinful," has been terrorizing Nigeria since 2009 in an effort to return the country to the pre-colonial era of Muslim rule. Over the past half-decade, the Islamist group has killedapproximately 5,000 Nigerians the group regards as pro-government in attacks on schools, churches, and mosques, as well as military checkpoints, police stations, highways, and a bus station in the capital city of Abuja.