Both parties agreed to have 3 hours of temporary truce to give way to providing medical assistance and food supplies to Hamas-ruled Palestinians in Gaza.

The agreed time was from 1pm-4pm but what was supposed to be a peaceful 3 hours turned into a moment of violence when Israel started firing towards the militants in Gaza only 15 minutes after 1pm.

According to Israeli Defense Ministry spokesman Peter Lerner, Hamas militants started targeting Israeli forces shortly after 1pm, seemingly having taken advantage of the moment to incur damage to the opposite party in Gaza. As precaution, Israeli forces were ready to respond to any form of aggression from them and therefore this has caused them to fire towards the militants after the threat was felt.

reference: Exchange of fire mars 3-hour truce in Gaza