A 20-year-old student pulled out a revolver and shot another man in the thumb during an argument on the campus of Middle Tennessee State University, authorities said Monday. The campus of 24,660 about 30 miles southeast of Nashville was on alert for about 45 minutes.

Police say Justin Macklin, a MTSU student from Memphis, got into an argument and shot at Austin Morrow of Murfreesboro, wounding the 20-year-old former student.

Police said the shooting occurred outside the student center, and the suspect then fled to a classroom building 200 yards away with Morrow in pursuit. At the building, police say, the suspect left a .32-caliber revolver, his shirt and two bags of marijuana. He was apprehended without incident when he left the building.

University President Sidney A. McPhee praised what he called the quick response by local and campus police.

Morrow was treated on the campus by paramedics. First reports that the shooting happened in a classroom were incorrect, police said later Monday.