The District’s new Francis A. Gregory branch library, which has been hailed as an architectural gem and a welcome addition to the community, was damaged last week when burglars broke in through one of its glass walls and made off with computer equipment.

Six computer monitors were taken in the June 26 break-in at the library in the 3600 block of Alabama Avenue SE.

Surveillance video released by D.C. police shows five people wearing hoods or masks prowling around outside the library and then breaking in through one of the glass panels in the rear.

Police said the thieves removed six 19-inch ASUS computer monitors.

The burglars apparently used a rock to break one of the large, diamond-shaped panels that form part of the library’s outer wall.

They then apparently enlarged the opening by kicking and punching it.

The break-in occurred about 5:30 a.m. No arrests have been reported.

The building, with its outer wall of mirror and glass, was hailed as “vibrant, strong and practical” last month in a Washington Post review of its architecture.

Designed by London-based architect David Adjaye, it opened to the public June 19.

A grand opening ceremony was held Saturday and went off “as planned,” said George Williams, spokesman for the District’s public library system.

The damaged window has been boarded up, and the patch was visible at the opening, Willliams said.

He said the window will be replaced.

Police have asked anyone with information to call (202) 727-9099.