Six Flags Magic Mountain planned to reopen to the public early Monday afternoon after a bomb threat targeting the amusement park was found to to be not credible, officials said.

The threat had delayed the opening of the park in Valencia Monday morning as sheriff’s deputies swept the sprawling property. That threat was received around 7:55 a.m., when the park was closed, according to the watch commander at the Los Angeles County Sheriff’s Department’s Santa Clarita Station.

Deputies in an armored vehicle combed the park at 26101 Magic Mountain Parkway at opening time, and a large number of sheriff’s SUVs and a fire crew staged at the location, which also includes Hurricane Harbor waterpark.

Employees returned to the park around 11:30 a.m. after the bomb threat was found to be unsubstantiated, park officials said. Magic Mountain was expected to open to visitors at 12:30 p.m.

“Safety is one of our top priorities.” said a Six Flags Magic Mountain spokesperson. “Earlier today, the park underwent a thorough safety check by the Los Angeles County Sheriff’s Department and California Highway Patrol. The park appreciates the timely response by both law enforcement agencies and values the ongoing partnership and commitment to keeping our community and guests safe.”

Southern California News Group staff contributed to this report.