Six people were killed - including two top Hamas operatives - in a shootout between Palestinian security personnel and members of the group's armed wing in Kalkilya early Sunday morning.
The firefight ensued when Palestinian police surrounded a house in the West Bank town in order to arrest Hamas gunmen inside.
Palestinian sources named the two dead Hamas men as Muhammad Yassin and Muhammad a-Saman, saying the former had died after attempting to detonate an explosives belt alongside the policemen.
Three Palestinian police officers and a civilian were also killed in the firefight.
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