The alleged shooter, Brenton Tarrant, tried to catch him and eventually fled the scene and was captured by police.

AVA- Abdul Aziz confronted the shooter responsible for the deaths of 49 worshipers in two mosques in Christchurch, New Zealand, when he picked up the first thing he could see, a credit card machine, and ran outside screaming "come here!" 
The alleged shooter, Brenton Tarrant, tried to catch him after Aziz threw the machine at him and eventually fled the scene. We was captured by police later. 
As Aziz explained it, the shooter attempted to return to his car to get another weapon. At this point Aziz picked up a gun the shooter left behind and attempted to shoot him with it, but there were no bullets left. Instead, he threw the weapon at the shooter's car, smashing the windshield.   
The Friday shooting is the deadliest mass shooting in New Zealand history. 
The acting Imam of Linwood mosque, Latef Alabi, said that without Aziz the death-toll would be much higher, the Times of Israel reported. 
"If he [Tarrant] managed to come into the mosque," he said, "then we would all probably be gone.”