Israel says its troops are looking for two Hamas Islamists they suspect of involvement in the disappearance of three Israeli teenagers.<br/> <br />One of the suspects has been named as Marwan Qawasme from Hebron.<br/> <br />The other is Amar Abu Aysha who's also from Hebron.<br/> <br />Both have served time in Israeli jails in the past.<br/> <br />Israel's scaled back its house-to-house searches for the missing youths on Tuesday after arresting several hundred Palestinians.<br/> <br />The teenagers went missing two weeks ago near a Jewish seminary at a West Bank settlement.