A former Ukrainian airbase employee, whose name was not disclosed to protect his relatives still living in Ukraine, said in an interview with the Komsomolskaya Pravda newspaper earlier this week that he saw a Ukrainian air force Su-25 combat jet taking off from an airbase in eastern Dnipropetrovsk carrying air-to-air missiles and returning without them on the day of Flight MH17 crash in southeastern Ukraine.
"Capt. Voloshin did not carry out flight missions [on July 17] as his plane was grounded for maintenance on July 16," the SBU said in a statement.
The SBU also said the Ukrainian air force did not carry out combat missions in support of ground operations on July 17 when Malaysia Airlines flight MH17, en route from Amsterdam to Kuala Lumpur, crashed in eastern Ukraine, killing all 298 people on board.
Earlier on Wednesday, Russian Investigative Committee spokesperson Vladimir Markin said investigators had interviewed a former Ukrainian airbase employee and that the facts that he had earlier revealed to Komsomolskaya Pravda had been confirmed to be true, as the witness's testimony was verified by a polygraph test.
According to Markin, the committee will "continue gathering and analyzing all the information about the disaster."
The accident is being investigated by an international group headed by the Dutch Safety Board, with the final report expected to be released in 2015.
Kiev has accused independence supporters in Ukraine's southeast of shooting the plane down, but has provided no evidence confirming the claim. The independence supporters say they do not have weapons which could down a plane flying at such a high altitude.