An NYPD investigation has been launched into an act of vandalism that shattered the window of a Williamsburg yeshiva.

Sources told VIN News that the incident took place at the Viznitz yeshiva on the corner of Flatbush and Flushing avenues on July 15th and wasn’t noticed until this morning.

Surveillance footage released by Williamsburg Shomrim shows what appears to be a masked woman in a baseball cap taking a hammer out of her shoulder bag and banging it three times against a window of the school building until the glass finally breaks.

The incident is currently under investigation by the NYPD.

Anyone with any information is asked to contact the Crime Stoppers Hotline by phone at 800-577-TIPS, by text at 247637 (CRIMES) and then entering TIP577 or online at www.NYPDCrimeStoppers.com.