Kent Police is appealing for witnesses following a serious collision at the St Nicholas roundabout on the A28.
Officers attended the scene following a report of a collision at 10.13am on Sunday 26 March.
Two motorcycles were reported to be travelling towards Brooksend and were in the process of overtaking a blue Mercedes car when they were involved in a crash.
One man was airlifted to a London hospital with serious injuries, and another was taken to a local hospital with minor injuries.
The St Nicholas roundabout – going towards Birchington – was closed while emergency services dealt with the incident.
The Serious Collision Investigation Unit is investigating and has asked that any witnesses who have not yet spoken to officers, get in contact on 01622 798528 quoting KH/MS/60/17.