The Kremlin will not comment on media reports citing unnamed sources, including those on Washington's alleged offer to help Russia investigate the A321 disaster in Egypt, spokesman Dmitry Peskov said Tuesday. "We have stated repeatedly in regard to this story, this aircraft tragedy, that any comments or reactions to reports citing sources are impossible. We will not do it this time either," Peskov told journalists. On October 31, an Airbus A321 operated by Russian airline Kogalymavia, crashed in Egypt's Sinai Peninsula. All 224 people on board were killed in what has become the largest civil aviation disaster in Russian and Soviet history.