A 55-year-old man arrested in connection with a Facebook threat against Montgomery High School in Bispham has been rebailed.
The man, from Blackpool, was told to return to the police station on May 26 after answering his initial bail yesterday.
He was arrested on suspicion of public nuisance and malicious communication offences in January.
Detectives launched an extensive investigation into the online messages, which threatened a US-style gun massacre at the school, in All Hallows Road, on December 30 and 31.
One online post said: “You think it’s a joke? You’ll see bullets, bodies, and blood.”
Police said from the start the threat was not being treated as credible, but officers stood guard as classes resumed following the Christmas break in a bid to reassure parents and pupils.
Initial attendances plummeted to just 268 – down from its usual 1,371 – but soon returned to normal, as head teacher Tony Nicholson accused the anonymous poster of spreading anxiety amongst parents.