Officials have told ABC15 they found several weapons while Tempe Town Lake was recently empty.
Tempe police said they recovered three pistols, a knife and a part of another pistol.
According to Tempe police, one of the pistols found was reported stolen out of Chandler.
Officials are investigating if any of the weapons were involved to any crimes.
The lake was drained in March so Tempe could construct a new dam.
