A former leading Bahraini politician has said there are "fears we could see some casualties" during this weekend's Formula One grand prix.

Economist Jasim Husain represented the primary opposition group Al-Wefaq for five years before resigning in protest during last year's anti-government demonstrations.

However, 14 months on from the Day of Rage that resulted in the deaths of many protesters, such reforms have been too slow in coming, according to a 58-page report into Bahrain by human rights organisation Amnesty International.

F1 is eager to distance the sporting event from the controversy. FIA president Jean Todt said his organisation was "only interested in sport not politics".

But one unnamed protester said: "People here are getting killed, and with F1 here we feel like they are driving on our blood, on our bodies."