A BB gun was seized from a man at a cinema in Tameside.
Police were called to Cineworld on Fold Way, Ashton-under-Lyne, at 5.15pm on Monday.
They seized a BB gun from a man, Greater Manchester Police confirmed.
No arrests have been made.
A GMP spokesman said: "At around 5.15pm on Monday, October 28, police attended a premises on Fold Way, Ashton-under-Lyne and seized a BB gun from a male.
"No arrests have been made.
"Enquiries are ongoing."
Read more of today's top stories
The incident came just a day after the cinema was evacuated due to a smoke alarm.
Several fire crews were scrambled to Fold Way shortly after 3pm on Sunday.
Customers said their films were interrupted by a message telling them to leave as there was a 'situation'.
A spokesman for Greater Manchester Fire and Rescue Service said: "We were called at 3pm and three fire engines were sent to the scene.
"There was no fire inside the building but what appeared to be smoke as a result of someone letting off a fire extinguisher."
