On Monday night clashes erupted between the PA security forces and Hamas fighters.
Seven Palestinians were injured in the clashes, three of them members of Al Aqsa Martyrs Brigades.
Eye-witnesses reported that several cars belonging to the PA and Hamas were burned during the clashes that lasted through the night.
Sources from Hamas blamed Fatah for the clashes after the destruction of Al Mostaqbal research center, which belongs to Hamas.
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