Britain's Foreign Office says the hostage crisis in Algeria "remains ongoing" but it has given no details of the situation.

In a statement released Friday morning, the Foreign Office said: "We are not in a position to give further information at this time."

Algerian helicopters and special forces stormed a gas plant in the stony plains of the Sahara on Thursday to wipe out Islamist militants and free hostages from at least 10 countries. Bloody chaos ensued, leaving the fate of the fighters and many of the captives uncertain.

The British statement repeated Prime Minister David Cameron's warning that the nation should be prepared for bad news.