Montgomery High School plans to open as normal on Monday following internet threats to 'kill as many people as possible'.
The Bispham school has been working with police since the anonymous threats were posted to Facebook, with a manhunt underway to find the person responsible.
And principal Tony Nicholson has tonight moved to reassure parents, saying officers have "confidently reinforced the view these online postings do not represent a credible threat."
He said in a statement: "They, and we, wish to reassure our parents and the wider school community that Montgomery High School can open as normal on Monday morning.
"We fully appreciate your anxiety and concerns. We wish to assure you that the safety of everyone is our number one priority."
In the series of chilling messages, the poster praises Columbine Massacre gunmen Eric Harris and Dylan Klebold, who murdered 12 students and one teacher at their US school in 1999, and said: “These guys are great. They killed a bunch of people in their high school and then killed themselves.
“Huge inspiration for the #MontyMassacre on Monday.”
In subsequent postings he added: “On Monday, the bullies will be sorry when I go into school with a gun.
“I’ll kill as many people as possible.
In another, he praised Sandy Hook Elementary School gunman Adam Lanza, who killed 20 children and six members of staff during his 2012 rampage, also in the US, saying: “I love guys that have the balls to pull something like this off, and on Monday I’ll be added to that list of people.
“Nobody talks to me or notices me except when they’re calling me a nerd and pushing me around.
“As soon as I tell people I’ve got a gun, I start getting bombarded with messages.
“You’re all ****** and you deserve what’s coming to you.”
When challenged by one student, he asked: “You think it’s a joke? You’ll see bullets, bodies, and blood.”
Security is set to be stepped up at the All Hallows Road school if police can't track the threat-maker down over the weekend, while several parents have vowed to keep their children away from classes until an arrest is made.
A spokesman for Lancashire Police said: “We are aware of the posts and are investigating them but at this time there is nothing to suggest they are credible.
“Notwithstanding, if the matter is not resolved by Monday, we will ensure an appropriate police response on Monday morning to ensure the safety of all persons in the school.”