The Federal Court of Canada is being asked to overturn the 2011 election result in Saskatoon-Rosetown-Biggar and six other federal ridings.

The Council of Canadians, a national advocacy group, says pre-recorded "robocalls" affected the result in the seven closely contested ridings during last year's federal election.

Conservative incumbent Kelly Block defeated Nettie Wiebe of the NDP by 538 votes in Saskatoon-Rosetown-Biggar.

All of the ridings named in the court applications were won by Conservative candidates, including six where the margin of victory was less than 1,000 votes.