01/09/2012 08:55 EST | Updated 03/10/2012 05:12 EST

Geary woman rescued from icy river

A Geary, N.B., woman is in critical condition after her vehicle plunged into the St. John River on Sunday morning.

Shirley Foster, 73, called 911 and told the operator her car had slid on to the ice in Maugerville and was beginning to sink.

Three Fredericton police officers were the first on the scene; RCMP were also called to assist.

Three officers jumped into the river and were able to pull the woman from the car before it became completely submerged.

RCMP are investigating the cause of the accident, but say slippery road conditions may have been a factor.