The Saturday discovery comes one day after the International Automobile Federation said the Bahrain Grand Prix will go ahead as scheduled.
Organizers gave the green light for next weekend’s race, despite calls from human rights groups for cancellation.
Anti-regime protesters have been taking to the streets in the past several days demanding the Formula One race be scrapped this year. Last year the Bahrain Grand Prix was called off due to unrest.
Activists say holding the game could be interpreted by the regime as implying that things have returned to normal whereas they have not.
Bahraini activists say six people have been killed during nationwide anti-regime demonstrations since March 17, 2012.
Bahrainis hold King Hamad bin Isa Al Khalifa responsible for the death of protesters during the popular uprising in the country that began in February 2011.
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