Authorities are stepping up security after a student was stabbed in a Brooklyn synagogue Tuesday.

Chabad officials say security has been tightened at the synagogue. Though they won't elaborate on what measures have been put in place, police cars and officers were present outside of the facility all day Tuesday.

According to police, 49-year-old Calvin Peters stabbed 22-year-old Israeli student Levi Rosenblat in the head at the Chabad Lubavitch World Headquarters in Crown Heights. Peters was then shot by an officer during a confrontation that was caught on cellphone video. He was pronounced dead at the hospital.

Police believe the stabbing was an isolated incident.

Rosenblat remains hospitalized in stable condition.