A man who went into cardiac arrest while he was being arrested by police in Regina on the weekend is in hospital in critical condition.

The suspect had allegedly broken into a suite in an apartment building on the 1200 block of Rae Street early Saturday morning, Regina police said.

Officers arrived to find two men fighting in the building's hallway. They managed to subdue the suspect enough to put handcuffs and leg restraints on him, Staff Sgt. Curtis Kemp said.

They also put a special hood over his head to stop him from spitting on them.

Shortly after that, officers noticed the man was not looking well, Kemp said.

"When this happened, EMS was immediately called. They attended immediately and they took control of the individual who was still quite [combative] and fighting, and then during the course of being dealt with, he went into cardiac arrest," he said.

He was revived and taken to hospital, where he was listed in critical condition.

According to Kemp, the man was not shot with a Taser, pepper sprayed or hit with a baton.

Police have launched an investigation into the incident. An RCMP officer has been appointed as an independent observer.