Boko Haram frees 20 people captured in Cameroon

Going by  BBC report, 20 out of the 80 people captured by members of Boko Haram in a cross-border attack in North Cameroon January 18th have been freed. 
Cameroon's Defence ministry in a statement released yesterday acknowledged that the hostages were freed "as defence forces pursued the attackers who were heading back to Nigeria".
Boko Haram launched a fierce attack on some villages in Cameroon, capturing 80 people who are mostly of children. 60 more persons are still in captivity.