JERUSALEM (JTA) — Three Israeli soldiers who fought in Israel’s Gaza operation have committed suicide in recent weeks.

The soldiers, all from the Givati Brigade, used their army-issue weapons to take their lives, according to reports. The weapons were found next to the soldiers’ bodies.

A reservist also committed suicide during his reserve duty replacing troops who were sent to Gaza.

One of the Givati troops was lone soldier David Gordon from Ohio, whose body was found with his weapon beside him in a ditch after he was missing for two days.

The Israeli military’s criminal investigation division is looking into the incidents.