BUSHWICK, Brooklyn (WABC) -- Police are investigating after vandals struck a synagogue in Brooklyn, breaking a window.
It happened while worshippers were holding services inside at Chabad of Bushwick.
Rabbi Menachem Heller says children were among at least 20 people inside when the vandals struck early Saturday morning.
"We jumped up. I just grabbed the kids and I ran...and we waited a few seconds and then we noticed two gentleman in the door through the window, through the glass of the door - we saw them looking in and then they continued walking," said Rabbi Heller.
Police say there is no evidence of something that was thrown - no rock or brick. Nothing came through the window, and nothing was outside.
Rabbi Heller says hate crime detectives came. The incident has not been ruled a hate crime, but he says he has his suspicions.
"This is a very warm community - Bushwick is a very open place, and this is not something typical that should happen over here," Heller added.
Mayor Bill de Blasio said Sunday that the NYPD will be adding extra security outside the synagogue as well as other synagogues nearby.
No one was injured in the incident.
Police are still looking for the vandals, and say the incident is still under investigation.
* More Brooklyn news
* Send us a news tip
* Download the abc7NY app for breaking news alerts
* Follow us on YouTube
Vandals break window at synagogue in Bushwick