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Officials think the attack on the officers is the work of multiple gunmen.

One of the suspects is dead. Authorities believe two others may be at large

The dead suspect in the Baton Rouge shooting was wearing all black and was wearing a mask, Baton Rouge Police Department Sgt. Don Coppola said. Coppola said he did not know what the mask looked like, but that it was "some type of mask to conceal (the shooter's) identity."

edition.cnn.com/2016/07/17/us/baton-route-police-shooting/index.html