The woman who gave birth after being severely beaten Sunday is in serious condition in hospital, while her newborn is in critical condition.

The baby was delivered on Sunday night in a Regina hospital after the 21-year-old woman was taken there from the White Bear First Nation.

"The baby, [a] little baby girl, she's in critical this morning and the mom is in serious condition," Sgt. Carole Raymond, a spokeswoman for the RCMP said Tuesday.

RCMP said there were three other children in the home at the time the woman was assaulted.

One of the children was the woman's four-year-old daughter.

No one has been arrested and police said they need help on the case. They are asking anyone who may have information about the incident to contact them.

Raymond said people could help with descriptions of any comings and goings from the woman's home on the reserve.

"If someone was walking up to the house, or ... a vehicle they might have seen," she said.

The timeframe police are looking at is from late Saturday afternoon, about 5 p.m. CST to 5:30 p.m. on Sunday.

No names have been released.

Police have not said exactly how far along the woman was in her pregnancy beyond describing it as being in the "later stage."

The assault is under investigation by Carlyle RCMP with the assistance of the Regina Major Crimes Unit.

People can contact the Carlyle detachment at (306) 453-6707.

Anonymous tips can be made to Saskatchewan Crime Stoppers at 1-800-222-8477.

The White Bear First Nation is about 200 kilometres southeast of Regina.