Russia Brushes off Criticism from Japan After Sailing Vessels Near Senkakus. Kyodo, June 11, 2016.
(c) "俄罗斯远东 '滨海边疆区新闻' 网10日报道说:所谓的 '三艘军舰'也是夸大,其实只是一艘老旧的军舰加上一艘拖船和一艘运油船。他们是服役于俄远东太平洋舰队的 '维诺格拉多夫海军上将' 号1155型大型反潜舰、'伊尔库特' 号运油船和 '福季·克雷洛夫'号拖船。"
(i) list of active Russian Navy ships https://en.wikipedia.org/wiki/List_of_active_Russian_Navy_ships
(A) " '维诺格拉多夫海军上将' 号1155型大型反潜舰"
is
(B) section 2.4 Destroyers:
Class ............Project .......Ship .............................Pennant no .....Commissioned ......Fleet
Udaloy ..........1155..........Admiral Vinogradov .......572 .................1988 ...................Pacific Fleet
* This Wiki page does not mention the other two ships that sailed by, but outside territorial waters of, Senkaku islands. (The "contiguous zone" is part of international waters.)
(ii) " '伊尔库特' 号运油船"
(A) Irkut (oil) tanker.
(B) Irkutsk https://en.wikipedia.org/wiki/Irkutsk
(a city and the administrative center of Irkutsk Oblast; "The Irkut River, from which the town takes its name, is a smaller river that joins the Angara directly opposite the city")
(iii) " '福季·克雷洛夫'号拖船"
(A) Fotiy Krylov (I fail to find out how the tug got its name.)
Which is "world's largest, most modern and most powerful tug."
(B) The Russian Navy Salvage tug Fotiy Krylov near Joint Base Pearl Harbor-Hickam. YouTube.com, published by otv104 on May 11, 2014 ("19 seconds"). https://www.youtube.com/watch?v=EmEHQ4DNGYI
(d) Other than the Kyodo News report ((b) above), there is no English-language news report on the matter. It is understood that the journalist 刘新宇 knows Russian language.