Palestinian security forces have handed over to Israel a Qassam rocket manufactured in the West bank, Army Radio reported on Monday.
So far the homemade Qassams, which have a range of a few kilometers, have only been fired at Israel from the Gaza, sometimes hitting towns like Sderot but often landing in empty desert.
But such a rocket fired from the West Bank could easily strike one of Israel's most densely populated areas.
The handover has been viewed as a sign of increasingly close cooperation between the Palestinian and Israel security establishments, despite a continuing freeze in direct negotiations between Israel and the Palestinian Authority.
Senior IDF officers hold regular joint meetings with Palestinian police chiefs and the army says the good relations between the forces have prevented violence.
On Sunday night, Israeli and West Bank authorities worked closely together to avert a clash when 35 rightwing Jewish activists flouted a ban on Israeli entry to Palestinian-controled zones and marched on Jericho.
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