A man has been arrested in relation to malicious Twitter postings directed at British Olympic diver Tom Daley.
Daley's father died of brain cancer a year ago and the 18-year-old Olympian had hoped to win a medal "for myself and my dad."
However, he finished fourth on Monday, out of medal contention, in the 10m synchronized platform with teammate Pete Waterfield.
Afterward, a Twitter user sent him several negative messages.
Dorset Police on Tuesday said a 17-year-old man was arrested "on suspicion of malicious communications" in relation to Twitter threats made against Daley.
The teenager had been staying at a Weymouth bed and breakfast for eight months, witnesses say.
Police smashed down the 17-year-old's door about 2.45am (BST) on Tuesday, put him in handcuffs and led him away to a waiting police vehicle.
He was arrested on suspicion of posting negative messages to Daley, referencing the diver's dead father.
A fellow guest said the man was quiet and had given the owners no trouble.
"We've seen him walking past us on the stairs," the witness said.
"The owners say he's been there for eight months and hadn't caused him a breath of trouble. He hasn't heard a squeak out of him."
The witness said she heard shouting early on Tuesday morning and was about to open her door to complain when the police warned they were going in.
"The door got smashed in and I heard the sound of the cuffs going on the man's wrists," she said.
"The next minute they were saying they were going to search the room."
One of the Tweets the man allegedly sent said: "You let your dad down, I hope you know that".
Daley, who lost his father to cancer in 2011, retorted "After giving it my all you get idiots sending me this" and re-tweeted the offensive message.
Police said the man was detained at a guest house in Weymouth.
In Britain, tweeting messages considered menacing can lead to prosecution.
It was particularly disappointing for Daley, who had earlier in the day thanked his backers for the support he had received.
"After the toughest year of my life, today is the day!" Daley wrote. "I just want to thank everyone for all their support no matter what the outcome."
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