Cancer treatment waiting times in Scotland are at their worst for ten years, campaigners have said.

New figures show 13% of patients who are urgently referred do not start treatment in the target time.

The Scottish Government's ambition is for 95% of those who are referred to be treated within two months.

Official figures show that between April and June, only 86.9% of patients began receiving help within 62 days - down from 88.1% in the previous quarter.

Health secretary Shona Robison announced a new group will be set up to improve waiting times for diagnosis and treatment, conceding that "some waits are too long".

Janice Preston, the head of Macmillan Cancer Support in Scotland, said: "Waiting times for cancer treatment are now worse than they were ten years ago when they were first introduced.

"Waiting to start treatment is an incredibly stressful time for most people. It's vital the reasons behind these delays are understood and a solution found.

"But we need a long-term solution, not a temporary fix. The cancer care system must adapt to meet the challenge of supporting the vastly increased numbers of people with cancer."

Only three health boards in Scotland - Dumfries and Galloway, Lanarkshire and Orkney - met the key cancer waiting times target.

The 95% target was only achieved for breast cancer patients, according to the latest NHS figures.

Almost one in five patients with head and neck cancer had to wait longer than two months for treatment to begin, with only 80.8% beginning their care within 62 days.

The Scottish Government intends to provide £1m of funding to fund the roll-out of new technology which will allow consultants to report on diagnostic scans taken anywhere in the country.

Robison said it would help "address short-falls in capacity in some areas".

Ministers are also providing £3m to increase the number of radiology trainees in Scotland by a minimum of 50 over the next five years.

The health secretary said she was "determined to go further" to help cancer patients.

She said: "The average wait for cancer treatment is six days, currently.

"However, some waits are too long and the new delivery group will report back to me in early 2018 with recommendations to enhance cancer diagnosis and treatment going forward."

Robison also highlighted separate figures showing 94% of cancer patients had a "positive experience" during their treatment and care.