Britain's main opposition Labour Party said on Tuesday it was subject to a large-scale cyberattack on its digital platforms just weeks before a national election but it was confident no data breach occurred.

British security services have warned that Russia and other countries could use cyberattacks or divisive political messages on social media to attempt to disrupt the Dec. 12 election.

"We have experienced a sophisticated and large-scale cyber attack on Labour digital platforms," a party spokesman said in a statement.