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Hamilton police say they have determined a bomb threat against Bishop Ryan Catholic Secondary was not credible following a search of the property on Tuesday.

For the second day in a row, classes at the Hamilton high school were disrupted and students were ordered to leave the building due to a threat.

HPS has completed the search at Bishop Ryan in #HamOnt and determined there was no validity to the threat. We continue to investigate the source to lay the appropriate charges. If you have any information, please contact 905-546-3851 @HWCDSB — Hamilton Police (@HamiltonPolice) October 30, 2018

READ MORE: Hamilton Police investigate weapons related threat to Bishop Ryan high school

Police said they were contacted at around 11 a.m. Tuesday regarding a bomb threat that was received by phone.

By noon, all students and staff were safely evacuated to Our Lady of the Assumption Catholic Elementary School.

HPS is investigating a threat at Bishop Ryan. HPS is on scene and students are being evacuated. More details to follow. #HamOnt @HWCDSB — Hamilton Police (@HamiltonPolice) October 30, 2018

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The Hamilton police tactical unit and bomb squad conducted a search through the building on Tuesday afternoon.

“At this point I can say that we haven’t seen anything to indicate that it’s a credible threat. However, as I mentioned yesterday, we take these things very seriously,” Hamilton police Supt. Will Mason said at a press conference on Tuesday afternoon while the search was ongoing.

On Monday morning, school officials reported receiving two phone calls from a voice believed to be male. Police said the caller threatened to bring a weapon to the school and harm students and teachers, prompting a lockdown that lasted several hours. The threat was later determined not to be valid.

Hamilton police are asking anyone with information to contact investigators.

WATCH: Hamilton school threatened two days in a row. Tom Hayes reports.

1:47 Hamilton school threatened 2 days in a row Hamilton school threatened 2 days in a row

All staff & students have been evacuted from B.R. Everyone is safe. Police are asking parents & caregivers to stay away from the area, expect traffic delays. #HamOnt @HWCDSB — Hamilton Police (@HamiltonPolice) October 30, 2018

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Bishop Ryan CSS is currently in lockdown after a threat similar to yesterday's was made against the school. Students are being evacuated to Our Lady of the Assumption. @HamiltonPolice is on scene. Parents/caregivers are asked to stay away from the school. — HWCDSB (@HWCDSB) October 30, 2018

The caller on Tuesday had a similar voice, Mason said, and the phone number was the same. He noted that phone numbers can be spoofed to hide the origin of the call.

Mason said while that the circumstances of both instances appear similar, investigators cannot definitively say the same individual is responsible for both.

He said these threats are not a joke and mentioned that Hamilton police are dedicating significant resources into identifying the origin of the calls.

Hamilton police say they are looking to speak with anyone who may have information regarding the case.

With files from Sara Cain

UPDATE: Bishop Ryan parents, please pick your children up at Our Lady of the Assumption CES. Regular transportation will be provided from OLOA at the end of the day. — HWCDSB (@HWCDSB) October 30, 2018