A teenager has been left with "possible life-changing injuries" following a crash in Wigan.
Officers are appealing for information following the collision in Higher Ince in Wigan between a van and a motorbike.
Shortly after 9.45pm on Monday, April 1, officers were called to reports of a collision between a blue Ford Transit van and a motorbike on Ince Green Lane.
Emergency services attended and the motorcyclist, a 19-year-old, was taken to hospital in a critical condition.
Police have since confirmed that the youngster is no longer in a critical condition, but that he sustained "possible life-changing injuries".
A 53-year-old man was arrested at the scene on suspicion of drug driving. It is not yet known if he has been charged.
Sergeant Darren Hancock, of GMP’s Serious Collision Investigation Unit, said: “This collision has left a man in a critical condition in hospital and my thoughts are with him, his family and his friends at this time.
“Our enquiries are continuing and I would urge anyone who witnessed what happened to get in touch with police as soon as you can.
“We are particularly keen to hear from anyone with dashcam footage who was in the area at the time.”
Anyone with information should call police on 0161 856 4741 quoting incident number 2425 of 01/04/19, or the independent charity Crimestoppers, anonymously, on 0800 555 111.
Enquiries are ongoing.