PARIS — A number of protective health outfits, similar to those worn by people dealing with the Ebola virus, have vanished from a locked room in a Paris hospitals.

A formal complaint was filed on Thursday, the same day Prime Minister Manuel Valls warned "there may also be a risk of chemical and bacteriological weapons" used by attackers.

The French capital has been on alert after 130 people were killed by gunmen and suicide bombers on Nov. 13.

The public AP-HP authority said Sunday a "limited number" of suits were missing from the Necker hospital but wouldn't confirm media reports saying a dozen hermetic protective overalls, three dozen pairs of special boots resistant to chemical agents, gloves and anti-bacterial masks have disappeared.

The AP-HP said the missing clothing were stored with other materials in code-locked premises but that many staff had access to the room to pick up ordinary supplies. Since the incident was discovered on Wednesday, security has been reinforced at the room.