They were among 68 abducted last month near the
town of Damboa in north-eastern Borno state.
Reports say the women escaped when the militants
went to attack a military base near Damboa on
Friday.
The Nigerian military said it killed more than 50
rebels in a clash that night.
Boko Haram is still holding more than 200
schoolgirls abducted in April.
Local vigilante Abbas Gava told journalists he had
"received an alert from my colleagues... that about
63 of the abducted women and girls had made it
back home".
"They took the bold step when their abductors
moved out to carry out an operation," he said.
A high-level security source in the state capital
Maiduguri confirmed the escape, AFP news agency
reported.

source: http://www.bbc.com/news/world-africa-28189035