WASHINGTON, March 13 (Reuters) - Police were investigating a bomb threat at Virginia's George Mason University on Thursday, and buildings were evacuated, the school said.
Authorities were seeking information about who made the threat to George Mason's Prince William campus, the university said on its website.
Three buildings were evacuated, and shuttle bus service was suspended, it said. The school was expected to reopen by 12 p.m. EDT (1600 GMT).
The school's students were on spring break this week. Nearly 33,920 students attend George Mason, according to the website.
The bomb threat came a week after a written threat was found at George Mason's Fairfax campus. A search turned up nothing.
The school is about 30 miles (48 km) southwest of Washington, near the Civil War battlefield of Bull Run. (Reporting by Ian Simpson; Editing by Scott Malone and Jonathan Oatis)