Police are investigating the fourth bomb threat at a central Pennsylvania Wal-Mart since Sept. 24.
The Centre Daily Times reports the store in Patton Township, near State College, was evacuated as a precaution about 5:30 p.m. Thursday. It reopened about 90 minutes later.
Township police have searched the store after each threat and found nothing. The store has evacuated customers and closed as a precaution after each threat.
Police are hoping someone will come forward with information on the threats.
No charges have been filed and no suspects have been named.