Social media
A posting on an account linked to a pro-Russia separatist leader in Ukraine, on a Russian social network site, claims that militants shot down at least one Ukrainian military plane near the Donetsk region town of Torez. The post has been deleted.

Photographs
Ukrainian government adviser Anton Herashchenko claims the plane was hit by a missile fired by a Buk SA-11 launcher, a Russian-made, surface-to-air missile system. Photographs of such a launcher in the town of Snezhne, near the crash site, appear on the internet. Later, photographs of a Buk being moved on a transporter from Ukraine to Russia appear.

The intercepts
Ukrainian authorities release a recording they claim is a conversation between pro-Russia militants admitting to shooting down the plane. A rebel fighter going by the nom de guerre of "Major" is heard telling another comrade called "Grek" that a group of fighters had brought the airliner down. "The plane broke up in the air, near the Petropavlovskaya mines. The first [casualty] has been found. It was a woman. A civilian," he says. At 5.42pm, "Major" acknowledges the plane was civilian: "Hell. It's almost 100% certain that it's a civilian plane."

In another recording, a Russian officer called Igor Bezler is apparently heard reporting on the downing of the jet to his superior in Russian military intelligence, Colonel Vasily Geranin: "A plane has just been shot down ... They've gone to search and photograph the plane. It is smoking."

In a third conversation, a rebel fighter says: "It turned out to be a passenger plane. It fell in Hrabove area. There's a sea of women and children ..."

Satellite detection
Satellite images show a plume of smoke left by a ground-to-air missile. The images help to compile an intelligence analysis shared with the UN security council by US ambassador Samantha Power, which she claimed showed the airliner was "likely downed by a surface-to-air missile, an SA-11, operated from a separatist-held location in eastern Ukraine". The location of the missile launch appears crucial.

"It strains credulity to think [the missile] could be used by separatists without at least some measure of Russian support and technical assistance," said Pentagon spokesman Rear Admiral John Kirby.