The UK Labour party has been hit by a "sophisticated and large-scale cyber attack" on its digital platforms.
A party spokeswoman said the cyber attack "failed" because of the party’s "robust security systems."
She said she was confident no data breach occurred.
"Security procedures have slowed down some of our campaign activities, but these were restored this morning and we are back up to full speed," she said.
She said the attack had been reported to the UK National Cyber Security Centre.