'Survivor' Contestant No Immunity From DUI Arrest

10/30/2011 12:20 AM PDT

'Survivor' Contestant -- No Immunity From DUI Arrest

Semhar Tadesse -- the first person booted from this season of "Survivor" -- was arrested Thursday on suspicion of DUI, TMZ has learned.

Law enforcement sources tell us, 25-year-old Semhar ran a red light in L.A. and was pulled over. We're told officers caught a whiff of alcohol from the vehicle ... and decided to administer a field sobriety test.

According to law enforcement sources, Semhar blew a .14 -- nearly twice the legal limit in California -- and was arrested on the spot. She was released hours later on $5,000 bail.

Sources close to Semhar tell us, she was unable to walk in a straight line because of a foot injury -- but the reality star is still accepting responsibility and feels extremely disappointed in herself ... especially after losing a close friend to drunk driving in the past.