WASHINGTON (AP) — Senior U.S. intelligence officials said Tuesday that Russia was responsible for “creating the conditions” that led to the shooting down of Malaysia Airlines Flight 17, but they offered no evidence of direct Russian government involvement.

The intelligence officials were cautious in their assessment, noting that while the Russians have been arming separatists in eastern Ukraine, the U.S. had no direct evidence that the missile used to shoot down the passenger jet came from Russia.