Kamran Nasir was in a finance lecture in Australia when a gunman slaughtered 50 people during Friday prayers at two mosques in the New Zealand city of Christchurch.
Within hours he had joined a band of about 60 volunteers on their way to wash the dead victims, in the sombre aftermath of New Zealand's worst modern mass shooting spree.
"We got this text - they need volunteers," Nasir, 35, told Reuters.
"It literally unfolded in an hour and half and we were running to the airport to catch a flight," he said, sitting with four friends who had also dropped everything to offer help.
Experienced in Islamic funeral rites, the men from Brisbane who are connected to charity group Brothers in Need are part of a contingent drawn from Australia and New Zealand to help a community overwhelmed by the number of bodies that must be dealt with according to ritual.
They also epitomise a spirit of generosity that has pulsed across a grieving city this week.
"The first thing that went through my head was: They need us," Nasir said.
He arrived in the early hours of Saturday, the same day Australian Brenton Tarrant, 28, a suspected white supremacist, was charged with murder over the killings. Tarrant was remanded without a plea and is due back in court on April 5 where police said he was likely to face more charges.
The majority of victims were migrants or refugees from countries such as Pakistan, India, Malaysia, Indonesia, Turkey, Somalia, Afghanistan and Bangladesh. The youngest was a three year old boy, born in New Zealand to Somali refugee parents.
The victims, after their bodies were removed from the crime scenes, had to be examined by investigators before they can be prepared for burial.
"It is a spiritual process, preparing the body to go into the next life," said 38-year-old Taufan Mawardi, one of Nasir's fellow volunteers.
"I've never personally done anything that's got to do with violent crime, particularly bodies that have been riddled with bullet holes or knife wounds or whatever that may be. So it is a bit confronting as well, anticipating what it's going to be like in there," he said.
Eight teams of six people will carry out the work of cleansing the bodies before burial.
"You start from the head, working down from the right to the left side, to the feet. The mouth and the nose have to be washed," Nasir said.
Officials say they have released one body and that they hope to complete their examinations of the other 49 killed as soon as possible.
"As much as it is emotional, we've got a very good support network," Nasir said.
"For me it is an honour. It is an honour to be washing these bodies."