British Prime Minister David Cameron said on Wednesday he was deeply saddened at news of the death of a teenage cancer sufferer who raised more than 3 million pounds ($5 million)for charity.
Stephen Sutton, 19, died in his sleep on Wednesday morning, his mother Jane said on Facebook.
Sutton, who was first diagnosed with cancer four years ago, raised the money for the Teenage Cancer Trust charity after news of his fundraising campaign spread on social media.
"My heart is bursting with pride but breaking with pain for my courageous, selfless, inspirational son who passed away peacefully in his sleep," Jane Sutton wrote to her son's 900,000 followers on Facebook.
Cameron wrote on Twitter: "I am deeply saddened to hear that Stephen Sutton has died. His spirit, bravery and fundraising for cancer research were all an inspiration."