Dramatic video footage has emerged showing the moment a security guard gunned down the terrorist who murdered Rabbi Yeshayahu Krishevsky in Jerusalem, after plowing his car into a bus stop and emerging wielding a knife.

The attacker - named as Alaa Abu Jamal, a resident of Jabal Mukhaber in eastern Jerusalem - also injured another man before being killed. The attack was the second deadly terrorist incident in the capital Tuesday, and the fourth terrorist attack nationwide, following a deadly shooting and stabbing attack aboard a Jerusalem bus, and two separate stabbings in Ra'anana.

The quick-thinking security guard who shot Abu Jamaal likely saved many other lives, as dozens more innocent bystanders looked on.

The footage shows the terrorist - apparently still dressed in the uniform of the Bezeq telephone company where he was employed - scrambling to his feet after his initial attack, only to be shoved into a wall by a pedestrian and immediately shot by the security guard.

A second shot rings out a few seconds later, followed by a commotion as the cameraman relays what he's seeing over the phone.

Border police arrive shortly after, and several additional shots are heard.