The causalities from a shooting incident in Iran on Sunday rose to four killed and twelve injured. The incident happened when an Iranian soldier opened fire on his colleagues in a military air base in eastern Tehran. 
The victims were sent to the hospital southern Tehran following the shooting in the military air base in Kahrizak, Russia Today reported. 
An Iranian soldier also opened fire on his colleagues in a military base in Abyek last July, killing three soldiers.

Source: Mena