British Athletics javelin coach David Parker has been suspended following allegations of an inappropriate relationship with a female athlete.
The 37-year-old is the lead throws coach at Loughborough University and has a part-time contract with British Athletics, where he works under the national governing body's throws and jumps coach Peter Stanley.
The relationship is understood to have taken place with an athlete at the university.
In a statement, British Athletics said: "British Athletics and Loughborough University can confirm that a coach has been suspended pending an investigation.
"Both organisations are working closely to support any athlete who may be impacted in any way."
Parker, the world junior javelin champion in 1998, was the British team leader at the European U23 Championship in Poland this summer.
Marathon runner Callum Hawkins has become the first British athlete to be selected for next summer's World Championships in London.
The Scot, 24, who finished an impressive ninth at the Rio Olympics in only his third marathon race, has been confirmed by British Athletics as the first member of its team for August's showpiece.
British Athletics performance director Neil Black said: "We are delighted to confirm Callum's selection for London. He has only competed over 26.2 miles three times, but we can already see the talent he has, finishing eighth at the London Marathon in 2016 and following that up in Rio at the Olympics with a brilliant ninth place."
Black added that the British team for the London World Championships would be "large and competitive".
Olympic gold medallists Mo Farah and Jessica Ennis will compete at the IAAF World Championships as part of a 60-strong British Athletics team, it has been announced.
Farah will defend his men's 5000m World Championships title at the event in Moscow, which takes place between 10 and 18 August.
British Athletics Performance Director Neil Black said, “The team selected for GB & NI are a mix of defending champions, potential medallists, finalists and some really exciting young talents that we seen as future medallists".