Tear gas has been fired at several dozen people protesting the execution by Saudi Arabia of prominent cleric Nimr al-Nimr.
Demonstrators carrying pictures of the cleric clashed with security forces in the village of Abu-Saiba, west of the capital Manama.
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The Democratic presidential candidate may also have shown his cards on his choice of running mate.
The US president also shared a post on Twitter accusing Dr Anthony Fauci of misleading the public over hydroxychloroquine.
Fears over an impending second wave of coronavirus dominates Wednesday’s front pages.