LONDON - A cyber attack on Britain's opposition Labour Party was a short-lived and unsuccessful attempt to take the party's websites offline, a security official with knowledge of the matter told Reuters.

An initial investigation indicated the attack was not particularly sophisticated, the official said. "It was really very everyday, nothing more than what you would expect to see on a regular basis."

Labour said earlier on Tuesday it was subject to a large-scale cyber attack on its digital platforms but that it was confident no data breach occurred just weeks before a national election. 

(Reporting by Jack Stubbs; Editing by Guy Faulconbridge) ((; Reuters Messaging: