Israel’s security service, Shin Bet, has arrested about 30 Palestinians [2] in the West Bank over the past few months on suspicion of working to rebuild the local infrastructure of Hamas [3], the Islamic militant group, according to a statement issued Monday. Hamas won legislative elections in the West Bank and Gaza in 2006 and took full control of Gaza a year later. Its rival, the Fatah-dominated Palestinian Authority, has limited control in the Israeli-occupied West Bank and has also worked to suppress Hamas there. Israeli security officials said those arrested were members of a “field command” responsible for strengthening Hamas’s presence in some West Bank universities.