San Francisco's AMC Metreon 16 was evacuated Tuesday night, after witnesses say a man with a gun began yelling during a screening of the movie Allied.

According to San Francisco Police Department spokesperson Officer Grace Gatpandan, at around 7:55 Tuesday night, emergency dispatchers received calls "about a person inside the Metreon Theater (4th/Mission Streets) possibly armed with a handgun."

The Chron spoke with a witness identified only as "Gary" who said that the male suspect "was yelling and behaving erratically just as the previews wrapped up." When Gary returned to the theater after seeking a manager to quiet the man down, "people were screaming and running out of the theater," saying that the man had a gun.

"Witness Jeff Wincek said he saw the glint of a gun barrel and that 'it was definitely a pistol' that the man was waving," the Chron reports.

Gatpandan says that following the 911 call, "officers from multiple districts responded to the area, ordering the evacuation of the theater in an abundance of caution."

"One subject was located and detained, with a handgun also located at the scene," she says. According to KTVU, however, "It ended up being a replica gun." (An attempt by SFist to confirm that detail with SFPD was unsuccessful as of publication time.) "Even though the gun is a replica," KTVU reports, "the suspect could be charged with felonies depending on the circumstances."

According to KTVU, "The suspect appeared to be an Asian man in his 60s." Saying that "Information on suspects is provided only if they are arrested and booked," Gatpandan declined to provide the identity of the man detained in the incident, and said that more information would be released later today.