VINCENNES, Ind. (AP): A campus lockdown was issued at Vincennes University overnight as police officers searched the area for a police impersonator.
 
       An alert was issued about 12:30 a.m. for a possible gunman near the junior college in southwestern Indiana. WFIE-TV reports the lockdown was lifted about three hours later as school officials said police had checked campus buildings.
 
       University spokesman Duane Chattin tells WTHR-TV that police were called to an off-campus student apartment about a possibly armed man impersonating an officer. He says officers spotted the man, but he ran into an apartment building, then climbed out a window and ran toward the campus where about 2,000 students live in residence halls.
 
       Police say no shots were fired, and no injuries were reported.