In the West Bank, Israel and the Palestinian Authority of Western-backed Palestinian President Mahmoud Abbas have cracked down on Islamic militants. Three Salafis, members of a movement that advocates a hard-line interpretation of Islamic law, were killed in a shootout with Israeli soldiers in the West Bank last November.
In Washington, State Department spokeswoman Marie Harf said U.S. investigators and intelligence officials were not yet able to corroborate the Israeli information and declined comment on specifics of the case.
"Obviously we're looking into it as well," Harf told reporters Wednesday. "I don't have reason to believe it's not true. I just don't have independent verification."
She said there were no plans to evacuate the U.S. Embassy in Tel Aviv and was not immediately aware of stepped-up security measures there in light of the arrests.