Two Domino's employees were stabbed during a robbery on Monday night.

Two heavily disguised men stabbed Domino's Pizza employees after becoming angry their robbery netted so little money, the Christchurch store's owner says.

One of the employees remains in hospital with a serious stab wound to his stomach.

The offenders, carrying a gun and a knife, entered the store in Harewood Rd, Bishopdale, about 10.10pm on Monday, acting Detective Sergeant Simon Keith said.

MARTIN VAN BEYNEN/FAIRFAX NZ Police are asking people with any information to come forward.

Despite complying with the robbers' requests, two employees, men in their mid 20s, were stabbed, Keith said.

The outlet's owner Eric Zong said he arrived soon after the robbery and was told the offenders became angry because the shop's takings were in a time delayed safe and they couldn't get any more than about $150.

One staff member was stabbed in the lower stomach and the other received a cut to the top of his chest.

"They come to the store and ask for money and they take the money from the till and then they asked the staff to open the safe. It's got a time delay. They got angry because they couldn't get much money. It wasn't worth it for them. They had to wait 15 minutes. They were in hurry. They thought wrong. We haven't got much money."

Security footage of the robbery was given to the police, Zong said.

"It looks professional. They didn't touch anything and they wore gloves."

Zong, who came to New Zealand 14 years ago, said he told his staff never to resist in a robbery situation.

"It's bad. In China they would be shot."

Manager Maninder Singh said he arrived to find the ambulance taking away the badly injured man.

"The till was open and a few coins were on the floor."

Singh said he helped bandage the staff member who was cut in the chest.

The offenders fled the store with an undisclosed sum of money and were still being sought by police.

Police completed a scene examination on Tuesday morning and CIB are investigating.

A Canterbury District Health Board spokeswoman confirmed on Tuesday the man with a stab wound to his stomach remained in Christchurch Hospital in a stable condition. It was not "clinically appropriate" for him to talk to media, she said.

Keith said police were following "positive lines of inquiry" in relation to the robbery.

Police want to hear from anyone who has found discarded clothing in the Bishopdale or Harewood areas.

Anyone who might have knowledge of the robbery or witnessed anything suspicious in the area about the time it occurred should contact police on 03 363 7400.

People could also call Crimestoppers anonymously on 0800 555 111.