After reports of casualties at the mosque, another mosque had been evacuated, said local media.
People in central Christchurch have been urged to stay indoors and report any suspicious behaviour immediately to authorities.
Prime Minister Jacinda Ardern said it's "one of New Zealand's darkest days" after multiple fatalities at the two mosques.
Taking to Twitter, he said: "Entire team got saved from active shooters!"
"I saw dead people everywhere".
Gambino crime family boss Frank Cali shot dead outside Staten Island home
According to the Associated Press, court documents referred to Cali as the underboss of the Gambino crime family . ET, officers received a 911 call reporting an assault in progress in front of Cali's house at 25 Hilltop Terrace.
A man with a gun reportedly went into the mosque about 1.40pm on Friday.
The Bangladesh cricket team was in the vicinity of the shooting but all members were safe, a team coach told media.
A eyewitness said it was a scary situation with people running down Deans Avenue, with armed police all around.
According to New Zealand Herald, a New Zealand Cricket spokesperson described the incident as an "unfolding situation", on being questioned whether the match will take place as scheduled after the incident.
A man who was at the mosque during the attack told news outlet TVNZ he hasn't seen his wife, who was also in the mosque this morning, since the shooting.
A witness told Radio New Zealand that they heard shots being fired inside the mosque and saw at least four people lying on the ground.
China prevents UN blacklisting of leader behind Kashmir attack
Even the global support for India post the Pulwama attack as well as its strike on Balakot; couldn't tilt the balance this time. On Monday, India's foreign secretary Vijay Gokhale met USA secretary of state Mike Pompeo to press the terror issue.
In response to a serious ongoing firearms incident in Christchurch all Christchurch schools have been placed into lockdown.
The city council offered a helpline for parents looking for kids attending a mass climate change rally nearby. "Frightening experience and please keep us in your prayers", he wrote.
There was no official information on casualties but a Bangladesh cricket team spokesman said none of the players were hurt.
A second shooting an linwood mosque has been confirmed by New Zealand Police only a few streets over.
Isam was with the team as they escaped through Hagley Park towards the cricket ground.
They ran back through Hagley Park back to the Oval.
What they're saying about the Odell Beckham Jr
Under the terms of the deal, the Giants would have sent a fourth-round pick (No. 132) in this year's NFL Draft to the Browns. OBJ's friendship with Landry put the Browns at the top of his list and the Giants obliged by sending him there.