5:10 PM PT -- TMZ has just obtained a photograph of Diddy after the accident, and he was so shaken up by the crash ... he had to lie down on the grass.
Diddy was involved in a serious car accident in L.A. moments ago ... TMZ has learned.
Law enforcement sources tell TMZ, a car turned left in front of Diddy's SUV and Diddy's driver t-boned the other vehicle.
Officers were called to the scene -- and cops claim everyone involved in the accident complained of pain, including Diddy, his driver, and the other driver.
It's unclear how seriously anyone was injured -- but law enforcement sources tell us, no one was transported to a hospital ... despite an ambulance being called.
A report was taken. No citations were issued.