A Tornado aircraft has crashed into The Wash close to a practice bombing range in Lincolnshire.
The Ministry of Defence (MoD) said the incident happened just after 1100 BST at Holbeach Range.
It is thought the GR4 Tornado was using the range. A spokesperson for the MoD said the crew ejected and two parachutes were seen.
The RAF has launched a rescue operation. An air sea rescue helicopter is also at the scene.