The Dundrod & District Motorcycle Club can confirm that two riders remain in a critical condition in hospital following two separate racing incidents.
Stephen Lynd from Templepatrick, Northern Ireland was injured after a crash during a Dundrod 150 practice session.
Gavin Lupton from Otley in West Yorkshire was injured after a crash during the Dundrod 150 Challenge race.
Further information about the two riders will be issued in due course.