Gleneagle Secondary School staff and students were evacuated to Scott Creek Middle School Thursday morning as Coquitlam RCMP dealt with an emergency situation.
RCMP has confirmed everyone from the school is safe and the school tweeted a message to parents saying they will be releasing children to parents.
Fifteen officers were called to Gleneagle, and police said they have been searching the school but have not found anything at the scene.
Police are continuing their investigation and did not provide further details.
On Thursday afternoon, Gleneagle principal Gerald Shong released a statement saying the school will remain closed for the rest of the day. Continuing education night classes are cancelled for the evening.
Shong said this was necessary to "facilitate the security of student belongings" left in the school because of the evacuation.
Students will be allowed back into the school Friday from 9 a.m. to 9:15 a.m. PT.