Burglars struck a Williamsburg jewelry store early Thursday morning, police say.

Catbird, the store, was closed for most of the day as investigators inspected the scene.

The NYPD says intruders cut through the front gate, broke the glass door and entered the store between 4 and 5:30 a.m. They wore masks and gloves and broke into a single display case inside.

It's unclear what exactly they stole or how much it is worth.