With the hostage drama entering its second day Thursday, Algerian security forces moved in, firrst with helicopter fire and then special forces, according to diplomats, a website close to the militants, and an Algerian security official. The government said it was forced to intervene because the militants were being stubborn and wanted to flee with the hostages.
The militants — led by a Mali-based al-Qaida offshoot known as the Masked Brigade — suffered losses in Thursday’s military assault, but succeeded in garnering a global audience.
Even violence-scarred Algerians were stunned by the brazen hostage-taking Wednesday, the biggest in northern Africa in years and the first to include Americans as targets. Mass fighting in the 1990s had largely spared the lucrative oil and gas industry that gives Algeria its economic independence and regional weight.
The hostage-taking raised questions about security for sites run by multinationals that are dotted across Africa’s largest country. It also raised the prospect of similar attacks on other countries allied against the extremist warlords and drug traffickers who rule a vast patch of desert across several countries in northwest Africa. Even the heavy-handed Algerian response may not deter groups looking for martyrdom and attention.
Casualty figures in the Algerian standoff varied widely. The remote location is extremely hard to reach and was surrounded by Algerian security forces — who, like the militants, are inclined to advertise their successes and minimize their failures.
The official news agency said four hostages were killed in Thursday’s operation, two Britons and two Filipinos. Two others, a Briton and an Algerian, died Wednesday in an ambush on a bus ferrying foreign workers to an airport. Citing hospital officials, the APS news agency said six Algerians and seven foreigners were injured.
The militants, via a Mauritanian news website, claimed that 35 hostages and 15 militants died in the helicopter strafing. A spokesman for the Masked Brigade told the Nouakchott Information Agency in Mauritania that only seven hostages survived.

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