DENVER — Four more unconfirmed incidents are being reported at Colorado high schools after an unconfirmed report of an active shooter was made at Boulder High School and an “unknown incident” happened near Aspen Schools.

So far, police have not found any victims at any of the schools, and almost all the schools have been cleared of any threat.

Brighton police investigated Brighton High School after a “threatening call” was made to dispatch.

Other schools were also briefly placed on secure status while police investigated, but police lifted the secure status at Brighton High School at 9:45 a.m. local time after finding no credible threat.

Cañon City police are also working to secure Cañon City High School after a bomb threat was called in to police.

Cañon City Schools updated their website at 10:04 a.m., saying the “validity of the threat is unknown at this time,” but no one has reported any injuries or suspects. The school was still on lockdown as of that update.

In Alamosa, Ortega Middle School was placed on lockdown due to a call reporting an armed person at the school, but Alamosa School District said in a release that the lockdown was lifted within five minutes.

Glenwood Springs High School was briefly locked down and other schools in the Roaring Fork district were on secure status, but all measures were lifted within 15 minutes.

Boulder High School is in the process of evacuating students and reunifying them, and all classes and after-school activities were canceled. No victims have been found there, either.

Aspen Schools have been cleared of any threats, the Pitkin County Sheriff’s Office said, and reunification is in progress there as well.

The Colorado Division of Homeland Security and Emergency Management said in a tweet they are monitoring the situation at the schools, but none of the districts have asked for assistance.