Kiev, Ukraine (CNN) -- A senior U.S. diplomat pointed the finger Friday at pro-Russian rebels in the downing of Malaysia Airlines Flight 17 in Ukraine, an act that killed 298 people.
U.S. Ambassador to the United Nations Samantha Power told an emergency meeting of the U.N. Security Council that the plane was "likely downed by a surface-to-air missile ... operated from a separatist-held location in eastern Ukraine." If pro-Russian separatists are responsible for shooting down the plane with a missile, investigators can't rule out the possibility that Russia offered help to operate the system, she said.