Students returned to classes Wednesday at IUPUI following a four-hour lockdown on Tuesday afternoon after a student reported seeing a man with a gun in a campus parking lot at about 12:30 p.m. School officials released a text alert around 12:55 p.m. urging students, faculty and staff to seek shelter as police searched for the suspect, who was reportedly wearing a long brown coat. IUPUI Police Capt. Bill Abston said authorities received word of two subsequent sightings but did not find anyone matching the description during their search. Some students said there was some confusion about what the lockdown entailed and whether they could leave buildings. Others credited the university and police with handling the situation quickly.