A Labour councillor and an MSP both put in complaints about an alleged culture of intimidation inside their local constituency party, the Sunday Herald has learned.

Margaret McCulloch, a List member for Central Scotland, and Councillor Susan Kerr made separate representations about alleged conduct inside East Kilbride Labour.

East Kilbride, Strathaven and Lesmahagow was won by Labour's Michael McCann in 2010 with a 14,503 majority, but the seat is being targeted by the Nationalists in May.

Party sources believe the seat is on a knife-edge as Labour's local party in the town is divided and marred by faction fighting.

In 2013, Kerr, who is married to former Labour finance minister Andy Kerr, complained to party headquarters about the behaviour of individuals in the CLP.

The South Lanarkshire councillor alleged that a culture of bullying and intimidation existed, and that members were being undermined.

McCulloch, elected to Holyrood in 2011, also put in a complaint around the same time about similar issues.

A party spokesman said the complaint from Kerr had been dealt with and the councillor was written to last month, but declined to comment on the outcome of the complaint.

This newspaper revealed earlier this month that Kerr and fellow South Lanarkshire councillor Gerry Convery were refusing to campaign in East Kilbride at the general election.

The duo said they would concentrate their efforts elsewhere for the party.

Lisa Cameron, a clinical psychologist, is contesting the seat for the Nationalists.

An SNP spokesperson said: "There is no place for bullying and intimidation in Scottish politics. These serious allegations must be properly investigated by Scottish Labour, rather than just swept under the carpet."