"They are safe. But they are mentally shocked".
Players of the Bangladesh team were visiting city's Masjid al Noor but escaped unscathed and reached safely back to the team hotel.
"I spoke to one of them shortly after (the incident)", Mario Villavarayen, the team's strength and conditioning coach told New Zealand Herald.
New Zealand and Bangladesh on Friday cancelled the third cricket Test after multiple people were killed in gun attacks on mosques in Christchurch, including one that was attended by the Bangladeshi team.
Isam said the whole team was under lockdown in their hotel and, as the match has been postponed, they are expecting to return to Bangladesh on Saturday.
Another eyewitness said people are being evacuated from near a second mosque in Christchurch and police are swarming the area.
New Zealand police commissioner Mike Bush said police had arrested four people. "What has happened here is an extraordinary and unprecedented act of violence".
New Zealand Prime Minister Jacinda Arden termed the shooting as "one of New Zealand's darkest days". "The players were stranded on the bus and called for help", he said.
Members of the Bangladesh cricket team were in a bus heading into the Deans Ave mosque when the first attack occurred.
"I tried to charge towards the team bus, which I saw from about 100 yards, I thought just go near to what was happening, there was live shooting going on at that time, there was fire - I saw one dead body and one person running towards me with a bloodied shoulder".
A video from ESPNCricinfo reporter Mohammad Isam showed the team looking visibly shaken as they rushed through Hagley Park to get away from the scene of the incident. They have chosen to make New Zealand their home and it is their home ... they are us. "They are in awful and severe mental (distress), they're not feeling well".
New Zealand police say they are hunting "an active shooter".
"Many of those who would have been affected by this shooting may be migrants to New Zealand", Ardern said.