US Olympic swimmer Ryan Lochte, who claimed that he was robbed at gunpoint in a Rio taxi, has apologised for his behaviour.

Writing on his Twitter account, he said he was sorry for "not being more careful and candid in how I described the events".

He also apologised for "taking the focus away from the many athletes fulfilling their dreams of participating in the Olympics."

His statement comes after his teammate Jimmy Feigen donated $11,000 (£8,200) to a Brazilian charity after falsely claiming they were robbed as they returned to the Athlete's village.