The Foreign Office has confirmed there's an ongoing operation at the gas plant in Algeria where a number of foreign workers are being held.
Some Britons are believed to remain caught up in the incident.
There have been mixed reports throughout the day about different numbers of hostages being able to escape.
The Algerian government has said up to 25 foreign hostages have been released from the siege at a gas plant in the country.
The crisis has reportedly left one Briton dead and several others captive at the hands of Islamist militants.
Meanwhile,an Irishman caught up in the Algerian hostage crisis is now free.
36-year-old Stephen McFaul, from west Belfast, made contact with his family at around 3pm.
Ireland's Department of Foreign Affairs has said he told his family that he was "safe and well" and no longer a hostage.
Mark Green is the Deputy Director of the Barnabas Fund, a Christian charity that campaigns for the abolition of the Islamic apostasy laws.
He told the News Hour on Premier that Christians remain a target for terrorists: