An explosion wounded two civilian passers-by in Bahrain, the interior ministry said on Wednesday, as demonstrators marked the sixth anniversary of an anti-government uprising that was bloodily suppressed.

The ministry did not say what caused Tuesday evening's blast in a village outside the capital Manama, but demonstrators sometimes throw petrol bombs during the sporadic protests that still grip the Sunni-ruled but Shia-majority kingdom.

"Terrorist blast in Sitra causes minor injuries to a married couple passing the site. Police at the scene," the ministry said on its Twitter account without elaborating.

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