Some hostages were reported to have escaped from a remote Algerian gas plant on Thursday, Jan 17, where dozens of foreigners and scores of Algerians were seized by Islamist gunmen demanding a halt to a French military campaign in neighboring Mali, Reuters reported.

Governments around the world were holding emergency meetings to respond to one of the biggest international hostage crises in decades, which sharply raises the stakes over the week-old French campaign against al Qaeda-linked rebels in the Sahara.

Algeria's Ennahar television said 15 foreigners, including two French citizens, had escaped the besieged plant deep in the Sahara desert. About 40 Algerians had also been freed, mainly women working as translators, it said.

A security source told Reuters the captors, encircled by Algerian troops, were demanding safe passage out with their prisoners. Algeria has refused to negotiate.

A group calling itself the "Battalion of Blood" says it seized 41 foreigners, including Americans, Japanese and Europeans, after storming a natural gas pumping station and employee barracks before dawn on Wednesday.

The attackers have demanded an end to the French military campaign in Mali, where hundreds of French paratroops and marines are launching a ground offensive against rebels a week after Paris began firing on militants from the air.