(Adds comments from Russian officials)
By Peter Rutherford
PYEONGCHANG, Feb 5 (Reuters) - Fifteen Russian athletes and coaches who had their lifetime bans overturned by world sport's highest tribunal will not be invited to this month's Pyeongchang Winter Olympics, the International Olympic Committee (IOC) said on Monday.
The Court of Arbitration for Sport (CAS) said last week that there was "insufficient evidence" of anti-doping violations against 28 Russian athletes. Although it confirmed 11 others had committed doping offences, it reduced their lifetime Olympic bans to suspensions from this year's Games in South Korea.
The IOC banned Russia from Pyeongchang over "systematic manipulation" of the anti-doping system in Sochi but left the door open to athletes with no history of doping to compete as neutrals, officially known as "Olympic Athletes from Russia".
After the CAS decision, Russia's Olympic Committee requested that 13 active athletes and two who had become coaches be allowed to participate in the Feb. 9-25 Games.
However, the IOC said in a statement that its Invitation Review Panel had "unanimously recommended that the IOC not extend an invitation" to the 15.
It noted that CAS had yet to provide a "full reasoning" for overturning the bans and that there was evidence about the athletes that had not been available to the Oswald Commission, which conducted the investigation into Russian doping.
"Following the detailed analysis conducted by the Panel, its members observed that there were additional elements and/or evidence, which could not be considered by the IOC Oswald Commission because it was not available to it, that raised suspicion about the integrity of these athletes," the IOC said.
Russian Prime Minister Dmitry Medvedev said the IOC decision was shameful.
"It was unfair and illegal, amoral and politicised," the RIA news agency quoted him as saying.
IOC President Thomas Bach said on Sunday the CAS decision was "extremely disappointing and surprising" and called for internal structural change at the court to allow it to "better manage the quality and the consistency of its jurisdiction".
On Monday, CAS President John Coates said it had taken note of Bach's concerns and they would be examined.
"Athletes are entitled to have confidence in judicial processes at all levels, more particularly before the CAS," Coates said in a statement.
"The reasoned decisions in high profile cases are critically important. The Panels in the cases of the 39 Russian athletes are working on them, and we look forward to their publication as soon as possible," he added.
"CAS will continue to evolve to ensure consistency and quality of jurisprudence." (Editing by Ed Osmond)