Moscow: Russia claims its flight records show a Ukrainian fighter jet was flying close to the Malaysian passenger plane just before it crashed and that Kiev was operating radar stations used for missile systems.
MH17: Russia's alternative theory
MH17 shot down by Russian-made missile
Syrian government launches Aleppo ground attack
Former Israeli president Shimon Peres dies
Mars mission plans unveiled
Inside Philippines' most overcrowded jail
Alicia Machado: Trump's 'Miss Piggy'
Volcanic ash strands thousands in Bali
MH17: Russia's alternative theory
Russian officials challenge the US to publish satellite images "which have never been seen" of flight MH17 being fired at by a missile, while claiming a Ukrainian fighter jet was flying close by at the time of the crash.
Separately, a Russian television program has accused the US Central Intelligence Agency of being behind the downing of flight MH17.
Moscow also denied supplying Ukrainian separatists with Buk missile systems or any other weapons, as it sought to head off international accusations it was responsible for the downing of the plane with 298 people on board.
Armed with slides, charts and images, two high-ranking officials of Russia’s general staff laid out a case against Ukraine at a specially called briefing.
Lieutenant-General Andrei Kartopolov said the plane strayed north of its planned route, adding that a Ukrainian SU-25 fighter jet, which is typically equipped with air-to-air missiles, had been recorded in the proximity of the Boeing 777.
The Malaysian plane “deviated from its route to the north ... the maximum deviation was 14 kilometres,” he said.
“An altitude gain was recorded for a Ukrainian armed forces plane. Its distance from the Malaysian Boeing was three to five kilometres,” he added, noting that the SU-25 is capable of reaching a height of 10,000 metres “for a brief time”.
“With what aim was a military plane flying along a civilian aviation route practically at the same time and at the same flight level as a passenger liner? We would like to receive an answer to this question.”
He also said the Russian Defence Ministry detected unusual activity from radar stations that are used to operate missile systems on the day of the tragedy.
“From July 17 [Thursday] the intensity of the operation of Ukrainian radar stations increased to the maximum,” General Kartopolov said.
He said seven radar stations were operating close to the area of the disaster on Tuesday, eight on Wednesday and nine on the day of the crash, Thursday. After the crash, just four radar stations were operating in the area on Friday and just two on Saturday, he added, citing data.
General Kartopolov insisted Russia had not supplied Ukrainian separatists with Buk missile systems or any other weapons. “I want to stress that Russia did not give the rebels Buk missile systems or any other kinds of weapons or military hardware.”
The general's explanation comes as US network NBC reported that a Russian broadcaster pinned the blame for the downing of Malaysia Airlines flight MH17 on the CIA.
The report, on Russia's Channel One, claimed the US had planned to do the same thing during the 1962 Cuban Missile Crisis - an event that brought the US and Russia close to nuclear war.
Russia's annexation of the Ukrainian region of Crimea in March has sparked the biggest East-West crisis since the Cold War.