Tags: Europe

U.S. President Barack Obama will invite allies to a Feb. 18 security summit in Washington to try and prevent violent extremism, U.S. Attorney General Eric Holder said on Sunday after meeting his European counterparts in Paris.

A policewoman was killed in a shootout in southern Paris on Thursday, triggering searches in the area as the manhunt widened for two brothers suspected of killing 12 people at a satirical magazine in an apparent Islamist militant strike.

Police are hunting three French nationals, including two brothers from the Paris region, after suspected Islamist gunmen killed 12 people at a satirical magazine on Wednesday, a police official and government source said.