WASHINGTON (AP) — Stepping up pressure on Moscow, the U.S. has released satellite images it says show that rockets have been fired from Russia into neighboring eastern Ukraine and that heavy artillery for separatists has crossed the border.

The images, which came from the U.S. Director of National Intelligence and could not be independently verified by The Associated Press, show blast marks where rockets were launched and craters where they landed. Officials said Sunday the images show heavy weapons fired between July 21 and July 26 — after the July 17 downing of Malaysia Airlines Flight 17.