Investigators believe that the Tsarnaev brothers used two handguns and a BB gun during their shootout in Watertown, according to a New York Times report.

Two handguns and a BB gun that the authorities believe the brothers used in an earlier shootout with officers in Watertown were also recovered, said one official briefed on the investigation. The authorities said they believe the suspects had fired roughly 80 rounds in that shootout, in which Tamerlan Tsarnaev was fatally wounded, the official said.

According to the Times, law enforcement officials also found an M-4 carbine rifle on the boat where Dzhokhar Tsarnaev was finally captured alive on Friday.