Emergency services have responded to a helicopter crash at Point Lonsdale this morning.
It's believed the chopper was seen crashing into water off Fellows Road just after 10am.
There were three people onboard the aircraft.
All three people managed to make it to shore and were located by passersby who contacted emergency services.
A yet to be formally identified male and female have been airlifted to hospital with serious injuries.
A yet to be formally identified male has been taken by road to hospital with serious injuries.
The exact circumstances surrounding the incident are yet to be determined at this stage.
The Australian Transport Safety Bureau will investigate the crash with assistance from police.
Anyone who witnessed the incident, has CCTV/dashcam footage or information is urged to contact Crime Stoppers on 1800 333 000 or www.crimestoppersvic.com.au.