A man was seen walking towards Blackpool town centre with a sword – sparking panic amongst residents on Facebook.
A number of people called 999 as the man waved the weapon around as he walked up Park Road at around 10.30pm yesterday, police said.
A man was arrested in Talbot Road around an hour later – though police said they have yet to find the sword.
One local Facebook group, in a post shared over 200 times, said the swordsman was rumoured to be in Layton, at around the same time the suspect was arrested.
It issued a ‘safety alert’ and said armed police had been seen close to Layton Cemetery and in Mowbray Drive.
“Lock up tight and report anything suspicious to 101,” it added.
A spokesman for Lancashire Police said nobody was hurt or threatened with the weapon.