Columbia Heights police searched the threatened schools and did not find anything suspicious on Monday.

COLUMBIA HEIGHTS, Minn. — Columbia Heights Public Schools closed Monday due to a bomb threat emailed to multiple schools in the district, according to the city’s police department.

In a press release Monday, the Columbia Heights Police Department said officers searched the affected schools and did not find anything suspicious. 

“Due to the timing of the information, it was not possible to fully investigate the threats prior to student arrival, and a decision was made to prioritize the safety of staff and students and cancel school for the day,” the police department shared in a statement. 

Students and staff are welcome back to classes on Tuesday and the Columbia Heights Police Department stated that officers are looking into the source of the bomb threat. 

This news comes after dozens of Columbia Heights parents and four students have been detained in the past few weeks. A photo of ICE agents detaining 5-year-old Liam Ramos at school pickup went viral. 

Liam spent two weeks in a detention center in Texas with his dad before a U.S. District Judge ruled that federal agents should release the two from custody, and they returned to Minnesota on Sunday. A preschooler and a second-grade student from Columbia Heights are still in detention facilities as of Jan. 30. 

The principal of Valley View Elementary School, Jason Kuhlman, told KARE 11 he starts each day by checking the perimeter. 

“When I come to school in the morning, I take a lap around my block with my truck first to see who is there, sitting there. When we go to dismiss kids, we look up and down the block,” Kuhlman said.Â