Two months after opening, Fiona’s Irish Pub (567 23rd Street S.) in Crystal City has closed — possibly for good.

“Due to circumstances beyond our control, we will be closed today, Sunday, June the 9th,” said a notice on the bar’s door. “We apologize for the inconvenience.”

But the establishment has not reopened and the pub’s website says it has closed permanently.

Earlier today a local beer vendor who had worked with the pub and staff at another nearby restaurant milled around outside the establishment swapping theories in the absence of any official reason. The timing coincided with the permanent closure of the pub’s other location at 5810 Kingstowne Center, though Covering the Corridor, a local blog, reported a representative said the Arlington location would remain open.

It was a sudden closure for a restaurant that had faced a series of delays, opening in April after missing a planned opening before St. Patrick’s Day. The closure also comes nearly a year after King Street Blues, another restaurant from the same owner, closed in Crystal City.

Fiona’s enjoyed favorable online reviews, though some noted a lack of customers.

Why Fiona is closed, and whether the Arlington location’s demise is permanent, remains unknown. The location was formerly home to long-time local bar Tortoise and Hare.