- Summary- Companies- Swedish Security Service says 'gross sabotage' indicated- Investigation shows detonations at Nord Stream 1 and 2 pipelines- Russia says not asked to participate in investigationHELSINKI/STOCKHOLM, Oct 6 (Reuters) - A crime scene investigation of the Nord Stream 1 and 2 gas pipelines from Russia to Europe found evidence of detonations, strengthening suspicions of "gross sabotage", Sweden's Security Service said on Thursday.Swedish and Danish authorities have been investigating four leaks after the pipelines, which link Russia and Germany via the Baltic Sea and have become a flashpoint in the Ukraine crisis, were damaged at the start of last week.Europe, which used to rely on Russia for about 40% of its gas, is facing an energy crisis in the aftermath of Moscow's invasion of Ukraine which has cut off supplies of the fuel in a continuing stand-off."As of now, there are no plans to ask the Russian side to join investigations," Kremlin spokesman Dmitry Peskov told reporters, adding that Moscow replied it was not possible to conduct an objective investigation without its participation."We will struggle to avoid a gas emergency this winter without at least 20% savings in private households, businesses and industry," Klaus Mueller of the Bundesnetzagentur said."