At least seven persons kidnapped by Boko Haram on Tuesday have been freed.

The seven were among  the yet to be confirmed number of oil explorers kidnapped by the terror group, alongside their security aides.

They were freed  after a rescue-mission embarked upon by a joint force of soldiers and local security personnel.

The council chairman of Magumeri Local Government Area of Borno State, Zanna Modu, informed journalists via a phone interview that the rescue was effected on Wednesday after a heated gun battle between soldiers and members of the terror group.

Modu said of the abducted persons, the troops were able to rescue four Civilian-JTF members, two NNPC personnel and a staff of the University of Maiduguri.

The NNPC had confirmed that it subcontracted part of the exploration to the Geology department of the University of Maiduguri.

The chairman said a large number of Boko Haram fighters were killed during the shootout.

He added that some vehicles belonging to the NNPC were also recovered.

The University of Maiduguri authorities have declined comment on the abduction incident, citing security concerns.

It is not yet clear if any of the abducted oil workers or their security aides still remain with the Boko Haram.