Manly will proceed with their game in Christchurch on Saturday week and spend three days before the emotional game assisting the devastated community rocked by Friday's terrorist attack.

Less than an hour after reports began of the horrifying shootings in mosques, Sea Eagles chief executive Lyall Gorman reached out to officials about how his NRL club could assist the community.

Rallying the troops: Manly's Daly Cherry-Evans speaks to teammates during their match against Wests Tigers. AAP

Manly have taken home games to the New Zealand city the past two years, but the round-three clash against the Warriors will arguably be the most emotional NRL game of the year.

"At this stage the game will go ahead, the [local league officials] were meeting with the deputy mayor on Saturday, not about the actual game but about how we could add value over there," Gorman told the Herald.

"We want to get over there and embrace the people of Christchurch. They're like a sister city to us.

"We all hurt on Friday and we're still hurting. We want to get over there and try to lift their spirits a little bit. We were always going over to do community work. That might change in its tone and texture now.

"We need to let the dust settle the next couple of days. I'm close to the mayor [Lianne Dalziel], she's a delightful lady, and we want to give them time.

"[Coach] Des [Hasler] texted me at 9pm on Friday asking what we can do over there. The game will happen."

Gorman said Manly would not beef up their own security, putting their faith in the officials who know the area well.

The Australian Department of Foreign Affairs and Trade stated on its website over the weekend for all travellers heading to the New Zealand city: "The shocking and unprecedented events in Christchurch on 15 March have attracted global attention. These terrorist attacks, motivated by extreme right-wing ideology, have drawn strong condemnation internationally.

"At this stage, it is difficult to anticipate fully international reactions to the attacks. Australians travelling overseas should continue to use common sense, be vigilant and exercise caution."

"We won't panic," Gorman said. "We'll remain respectful and work closely with the people on the ground over there and try to make a difference and lift the spirits.

"The people of Christchurch have come back before [from earthquakes] but how do you comprehend this and what has happened there on Friday?

"The footy teams will do the right thing over there and play some good footy. We'll support a wonderful city and a wonderful community."

A minute's silence was observed at Leichhardt Oval before Manly and Wests Tigers met on Saturday night.

The Super Rugby derby between the Highlanders and Crusaders on Saturday was abandoned as the country mourned but not because of security fears.

Meanwhile, Gorman said the Sea Eagles would meet this week to discuss finding a replacement for Dylan Walker while he remains stood down from the game as he awaits criminal court proceedings.