An armed robbery at a Portland bar Friday afternoon was the ninth in a string of attacks dating to November 12.

A single gunman burst into the Barlow Tavern on North Greeley Avenue around 5 p.m. Friday. Security video of the intrusion posted on Facebook shows one masked robber -- evidently undeterred by the full bar -- demanding money and leaving less than a minute later with the loot.

Police confirmed Friday’s robbery but gave few details, citing the ongoing investigation. They said it’s not clear whether the afternoon robbery is connected to prior attacks.

“Officers searched the area and were unable to locate the suspect. No arrests have been made,” police said in a written statement to The Oregonian/OregonLive. “There were no reported injuries."

The Oregonian/OregonLive reported last week that gun-wielding attackers had robbed eight Portland bars since mid-November. It’s not clear whether those attacks are linked to one another.

Police have reported no arrests in any of the robberies.

The prior attacks generally took place early in the week and late at night. Most if not all involved two robbers, in contrast to Friday’s prime-time, one-man stickup at the Barlow Tavern.

But all the other recent tavern robberies were, like Friday’s, at bars in north or east Portland.

-- Oregonian reporters Shane Dixon Kavanaugh and Emily Goodykoontz contributed to this report.

-- Mike Rogoway | twitter: @rogoway | 503-294-7699