Four schools in the south Denver metro area were placed on lockout Tuesday after officials received a tip that a student was going to bring a gun to school for "self protection." That lockout was lifted a few hours later -- but then, the district went on another lockout for another reason.

Mark Stevens, a spokesperson for the Sheridan School District, says the student who reportedly was going to bring the gun attends SOAR Academy and did not come to class Tuesday. He was unaccounted for for hours, but has since been located and was talking to police, Stevens said.

Stevens told 9NEWS earlier that the student had made a threat, but later called back and said the information provided to him was incorrect. We updated this article to reflect that change.

The latest lockout stemmed from someone trying to get into Sheridan High School. That suspect has since been found outside Sheridan city limits and taken into custody, according to a tweet from Sheridan Police.

The following schools were placed on lockout:

-Early Childhood Center

-Alice Terry Elementary

-Fort Logan Northgate 3-8

-Sheridan High School

-SOAR Academy