Family members were surprised when an infant was born Sunday in this toilet in a Winnipeg home. (CBC)The Winnipeg family of a newborn who was rescued from a toilet in a North End home expressed gratitude Monday for the quick thinking of two city police officers.

The officers, from the force's street-crime unit, were conducting an investigation at a Flora Avenue home at about 1:30 p.m. CT Sunday when they heard a commotion in the home, with people shouting and focused on the bathroom, police said.

'Nobody even knew she was pregnant.'— Lillian Richard, newborn's grandma

The officers discovered a woman had just delivered a baby boy into the toilet bowl.

"I look and I see her sitting here and crying and pointing at the toilet. So I look and there is a baby in there with the foot hanging out and there's blood everywhere and I didn't know what to do and so I got really shocked," said Keith Richard, a cousin of the woman.

Amidst the panic and confusion, the officers swept in and took control of the situation.

"They grabbed baby and one police officer gave CPR to that baby and it started breathing and saved that baby's life," said Joseph Murdoch, the infant's grandfather.

Paramedics arrived and rushed the five-pound, nine-ounce boy to hospital in critical condition, police said.

The as-yet unnamed infant has been upgraded to stable condition, police said. His 32-year-old mother, Heather Richard, was also in hospital and doing well.

"Nobody even knew she was pregnant," said Lillian Richard, the baby's grandmother. "She didn't even know, 'cause she's a hefty girl. She only thought she was getting the cramps, like gas and that. She'd feel little flutters."

Lillian Richard expresses thanks to the Winnipeg police officers who gave CPR to her newborn grandson after he was born in a toilet and wasn't breathing. (CBC)Both Richard and Murdoch said everyone in the family is grateful for what the officers did.

The officers are not being identified because they often work undercover. police said.

Police didn't provide any information about the nature of the investigation the officers were conducting at the home.