Police investigating a fatal crash near Beaminster in Dorset would like to hear from anyone who saw what happened.
It took place on Sunday morning on the A3066 at the north entrance to the Beaminster tunnel.
Officers say a motorbike rider travelling towards to Beaminster lost control and hit the tunnel parapet. The rider, a 65-year-old man from Wincanton, died at the scene.
The road was closed for several hours while the emergency services attended.
The road was closed for five hours while the emergency services attended. You can watch video of the investigators at the tunnel below:
The Beaminster Tunnel has now been closed for more than a year, after a landslide which killed a couple from Somerset.
Rosemary Snell and Michael Rolfe were driving home after an evening out on the 7th July when their car was crushed. Their bodies weren't found for ten days. Work has been taking place to stabilise the site but the road is likely to stay shut until the end of the month at least.
The Department for Transport has refused to fund the cost of repairing the Beaminster Tunnel in Dorset.
It was closed in July after heavy rain caused a landslide which killed two people.
The cost of the repair is estimated to be £2.1 million.
Tributes have been paid to the man who died in the landslip outside Beaminster tunnel in Dorset thirteen days ago. Michael Rolfe from Fivehead near Taunton, was on his way home from a night out with a friend when the car they were in got caught in the mudslide.
His friend, Rosemary Snell who lived in Misterton near Crewkerne also died. Today Dorset Police confirmed that they'd referred their handling of the incident to the Independent Police Complants Commission. The car was left undiscovered for ten days. Richard Lawrence reports.