Rio de Janeiro: An official media bus at the Rio Olympics has been hit by projectiles travelling between one of the Games' four main competition zones and the main press hub.

The incident occurred on Tuesday night in the notoriously high crime area of Deodoro, where a bullet was fired into a press centre at the equestrian on Saturday.

Deodoro is about 25 kilometres from the main media centre and is hosting hockey, equestrian, women's basketball and rugby sevens competition.

A government official has told Fairfax Media the media transport bus was hit by stones, but claims windows were shattered by gunfire are being investigated.