One of the two threats of violence against schools in the Toronto area has been proven to be a prank as a student came forward to police and school officials Friday morning.

A threat scrawled on a washroom wall of Crestwood Preparatory College, a private high school near York Mills Road and Victoria Park Avenue, claimed the school would be shot up "like Columbine" on Friday.

Reports say the teen showed up at the school with his parents to confess.

Police were set to be on-hand at the school all day. There is no word on if charges will be laid.

At the same time, an Oakville high school opened its doors this morning after receiving a similar threat earlier this week. But only 400 of the school's 1,200 students showed up for classes.

The threat was clearly on the minds of students walking into the school Friday morning.

"Thinking this could really happen, going back to Columbine (and) Montreal. It's a scary thought," a student named Lisa said, adding that she made the decision to go to class anyhow.

A note found on the washroom wall at Iroquois Ridge High School said two gunmen would open fire on Friday.

One student told CTV's Austin Delaney he thinks the threatening message is a cry for help.

"Attention, maybe?"

Police took the message seriously and launched an investigation. School board officials notified parents and considered their options for the school day. They chose to keep the school open.

Peel police officers are expected to be on campus throughout the day. They urged the author of the threat to come forward.

Police said charges could be laid.

With a report from CTV's Austin Delaney