The Latest: 4 suspects sought in Geneva said to have IS ties

At least seven of the weapons used or discovered after the Nov. 13 attacks that killed 130 people have been identified as produced by the Serbian factory, most of them manufactured before Yugoslavia broke up in a civil war in the 1990s.

German prosecutors say they have determined that a 24-year-old man in custody on suspicion of violating weapons trafficking laws did not supply the assault rifles used in the Paris attacks.

Stuttgart prosecutors' spokeswoman Claudia Krauth said Thursday that investigators who had arrested the man from Magstadt on other weapons charges had found emails indicating he might have delivered four Kalashnikov rifles to a Paris address.

Senior officials from Britain, the U.S. and five European countries have agreed to closer cooperation in the fight against radicalization and the threat from the Islamic State group.

May said Thursday's approval by a key committee of EU lawmakers of a plan to share airline passenger information among all 28 member states was an important step.

Geneva's security department said Thursday that city authorities received word on Wednesday that Swiss federal authorities had flagged "suspicious individuals susceptible to being in Geneva or the Geneva region."

The European Parliament Civil Liberties committee voted 38-19 Thursday to approve the airline passenger information system, with two abstentions.

The plan grants law enforcement agencies access to information about air travelers for at least six months.