Law enforcement sources tell us the armed robbery went down Tuesday in South Los Angeles -- and the producer was sitting in his car with another person when 2 black male suspects walked up, pulled out a gun and demanded the goods. They made off in a gray Nissan Altima.
Sources on the music video shoot say the producer, named Mars, had walked about a block from the set when his jewelry and his wallet -- stuffed with a couple thousand bucks -- got jacked.
A rep for Game said everyone on the set is supposed to have security while walking around the neighborhood. A TMZ camera guy was on the block when Game got word of the robbery and started chewing out his security team.