Ultimately, Shaukat Khan, 49, was heartbroken to learn of the death of Naeem Rashid, 50, and Rashid's son Talha, 21.
Police warned Muslims all over the country not to visit mosques "anywhere in New Zealand" in the wake of the Christchurch attacks.
"The young guy who usually takes care of the mosque. he saw an opportunity and pounced [on the gunman] and took his gun", Syed Mazharuddin said.
Rashid, hailing from Abbottabad, received bullet wounds as he tried to overpower the shooter as he entered one of the mosques in Christchurch, the daily said.
Rashid and his son will be buried in Christchurch.
New Zealand's Prime Minister Jacinda Ardern called the shooting a terrorist act, saying it was the country's "darkest day". Khan said he last met Rashid about six or seven years ago at a function in Pakistan.
Meanwhile, people in New Zealand are moving to support the survivors of the attacks and bereaved families.
"Whatever the families will decide, we will respect it and fulfill their wishes", he said, adding that flags will be flown at half-mast in Pakistan on Monday in honour of the victims.
"Pakistan is proud of Mian Naeem Rashid who was martyred trying to tackle the White Supremacist terrorist & his courage will be recognised with a national award", Khan tweeted on Sunday.
"After that, I heard shooting and he screamed and after that I didn't hear him", she continued.
Brenton Harrison Tarrant, a 28-year-old Australian national and avowed white supremacist, is believed to have carried out the attacks at two mosques that left at least 50 people dead and just as many injured. While a preliminary list of the victims has been shared with families, Bush said their bodies have not yet been released.
The survivors included 17 members of Bangladesh's cricket team, whose game against New Zealand on Saturday has been cancelled, and a Palestinian man who fled for his life after seeing someone being shot in the head.