Bahman Golbarnezhad of Iran of Cuba competes in Men's Individual C4-5 1km Cycling Time Trial final on day 2 of the London 2012 Paralympic Games at Velodrome on August 31, 2012 in London, England. [Photo/VCG]

The Iranian flag has been lowered to half-mast in the Athletes Village.

The Paralympic flag will also be flown at half-mast in the village and at the Riocentro venue where Iran play Bosnia in the sitting volleyball final on Sunday.

"This is truly heart-breaking news and the thoughts and condolences of the whole Paralympic movement are with Bahman's family, friends and team mates as well as the whole of the National Paralympic Committee of Iran," said IPC president Philip Craven.

"The Paralympic family is united in grief at this horrendous tragedy which casts a shadow over what has been a great Paralympic Games here in Rio."

A moment of silence will be held during Sunday's closing ceremony, said the IPC.