A Chicago man is accused of threatening to bomb Southern Illinois University’s flagship Carbondale campus and kill 4,000 students and staff.

WSIU Radio reports that a federal grand jury has indicted 23-year-old Maurice Wiggins on a felony charge of making a bomb threat.

Authorities allege that Wiggins made the threat via the Internet on Aug. 29, sending a message from his cell phone to the 20,000-student university’s crime-watch website.

Wiggins, who was never a student at SIU, allegedly said he planned to bomb three dormitories and a student center.

University spokesman Rod Sievers said the FBI tracked Wiggins down within 48 hours.

Wiggins couldn’t be reached for comment Tuesday. Online court records don’t indicate if he has an attorney, and Wiggins doesn’t have a listed home telephone number.

The charge is punishable by up to 10 years in prison and $250,000 in fines.

_The Associated Press contributed to this report._