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Police lift Virginia Tech alert for possible gunman

Composite sketch of possible gunman reportedly seen on the Virginia Tech University campus, Thursday, August 4, 2011

(CBS/AP) BLACKSBURG, Va. - Police at Virginia Tech University have lifted the alert for a possible gunman on the Blacksburg campus, and say the community can resume normal activity.

Authorities said they have discovered no additional information about a person suspected of carrying a weapon on the campus Thursday morning, which was reported by three teenagers attending a summer camp at the school.

Police say there will continue to be a large law enforcement presence on campus today. Classes at the Blacksburg campus classes were cancelled.

Earlier the university posted alerts on its website and official twitter account warning students and staff to stay indoors. The school also sounded its emergency alarms and sent an alert by voicemail, text message and email.

Police did not say whether they believe the report of a suspected gunman was in error.

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