The incident happened shortly after midday and is still ongoing.
A statement from the Coastguard said: “At 12.50pm today (9 June) HM Coastguard was asked to assist the North East Ambulance service with a report of someone with a leg injury at Blackhall Rocks.
“Coastguard rescue teams from Seaham and Hartlepool have been sent. Crews are on scene.”
The NEAS have also been contacted for comment.