If the United States ever conducts coordinated airstrikes in Syria with Russia, the U.S. military will not share intelligence with the Russians, the nation’s most senior military officer told senators Thursday, underscoring in a very public way the divide between the Pentagon and the State Department on Syria policy.

The cessation of hostilities agreement negotiated by Secretary of State John Kerry calls for creating a Joint Implementation Center where U.S. and Russians would work together to target the Islamic State and other terrorist groups in Syria, by coordinating airstrikes and targeting info.