MODESTO, Calif. (AP) -- A California weightlifter says he accidentally shot himself by dropping a dumbbell on a bullet.

The man was wounded in the shoulder.

He told Modesto police officers he was lifting dumbbells in his home Wednesday night when he dropped one on a .22 caliber bullet. The man's name hasn't been released.

Modesto police investigators say the man's story is suspicious, but not impossible.

Officer Chris Adams tells the Modesto Bee ( http://bit.ly/HOfb79 ) that impact on the rim of the bullet could have caused it to fire.

Officers did not find a gun but did find the shell casing.

Neighbors did not see anyone leaving the man's home.

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Information from: The Modesto Bee, http://www.modbee.com