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Manama - A home-made bomb exploded in a car in the centre of the Bahraini capital Manama on Sunday, the Interior Ministry said, as the kingdom hosted a Formula 1 motor racing Grand Prix.
Earlier, three witnesses had reported hearing a blast in the bustling Adliya district, where many foreigners live. The interior ministry confirmed the incident on its Twitter account, saying the car had burnt as a result of the explosion.
There were no reports of casualties. Police blocked off the road where the incident took place near a government security building.
Small bomb blasts occur sporadically in the US-allied kingdom, which has witnessed low-level political unrest since 2011, when protests mainly by the Shi'a Muslim community erupted to demand democratic reforms in the Sunni-led government.
But unrest in the run-up to the race, staged about 30km south of Manama at the Sakhir desert circuit, was markedly lower than in the past two years, apparently due to a more effective security clampdown on Shi'a villages.
The government sees the Bahrain Grand Prix as a way to raise Bahrain's international profile and attract tourists and foreign investment.
In 2011, when the unrest first broke out as part of the Arab Spring, the race had to be cancelled.
Many Bahraini Shi'as complain of discrimination, especially in employment and housing, a charge that the government denies.
Political reconciliation talks between the government and opposition have made little progress.
Earlier on Sunday, a small crowd of youths in the Shi'a village of al-Eker, south of Manama, burned tyres and threw stones at police who responded by firing teargas, Reuters witnesses said. The youths quickly dispersed.
Bahraini activists reported similar sporadic unrest in other areas where dozens of protesters marched inside villages and others threw stones at police who seemed to effectively block off the main entrances to the villages. Reuters could not immediately verify these accounts.
On Friday, tens of thousands of mainly Shi'a protesters had marched for democratic reforms and on Thursday, anti-government demonstrators throwing petrol bombs clashed with police who fired tear gas and birdshot following a funeral procession in al-Eker.
Meanwhile, police have increasingly come under attack in recent months from home-made bombs and dozens of Bahrainis have been sentenced to prison terms ranging up to life in prison for attacking police stations and attempting to kill policemen.
One of three blasts last month killed three policemen, including one from the UAE. Bahrain quelled the uprising in 2011 with help from forces from its Sunni Gulf Arab allies, Saudi Arabia and the United Arab Emirates. - Reuters