A Midcoast school district canceled classes Monday after reported bomb threats toward multiple Topsham-area schools, according to school officials.

Topsham police Chief Marc Hagan said in a news release Monday morning that his department was notified of a bomb threat to all Topsham-based schools around 5:30 a.m. Monday.

Officers searched each school and found no suspicious items, Hagan wrote.

“At this time the threat is not considered credible and there is no danger to the public,” Hagan wrote.

Maine School Administrative District 75 Superintendent Heidi O’Leary initially announced a two-hour delay Monday morning, saying the threats were likely a hoax. She later told parents that classes were canceled due to the nature of the messages.

“While many such threats are often determined to be hoaxes, the volume and scope of these messages across multiple buildings have created an environment of insecurity and potential chaos,” O’Leary wrote in the announcement. “We must treat all threats as credible until law enforcement can fully confirm otherwise.”

The superintendent said the decision was made out of an abundance of caution and that the district is working with local authorities.

Students at MSAD 75’s Mt. Ararat High School — along with those from Morse High School in Bath, Brunswick High School and Lincoln Academy — had planned to walk out of school at noon Monday to protest U.S. Immigration and Customs Enforcement activities.

That walkout was still scheduled to go forward as of Monday morning, according to organizers.

Other Maine schools received similar threats Monday, Hagan said.

George Stevens Academy in Blue Hill and All Saints Catholic School in Bangor were also the target of threatening messages Monday, the Bangor Daily News reported. George Stevens Academy was evacuated Monday, while the Bangor Catholic school delayed opening.