His brother Hamza tried to phone his mother Salwa.
Both brothers didn't know that their father Khaled Mustafa, 44, had been shot dead.
Today, while recovering in a wheelchair Zaid, who came to New Zealand last year with his family as refugees from a town outside Damascus in war-torn Syria via Jordan, gave an emotional account of what happened last Friday.
The Cashmere High School pupil had gone with his father, brother, and a family friend to prayer at Al Noor Mosque.