Montenegrin police said on Thursday that the man who threw a grenade into the US embassy compound in Podgorica and then killed himself had no criminal record and that the attack was not an act of terrorism.
The US State Department also said on Thursday that it doesn't believe that an attack on the American embassy in Montenegro "is part of an ongoing threat".
The Russian Ministry of Foreign Affairs announced this on Tuesday.
"There are Russian nationals in Syria who have come there of their free will and for different goals. It is not for the Foreign Ministry to assess the legitimacy and legality of such decisions they have made," said a statement carried by TASS.