[Russian Foreign Minister Sergey Lavrov, chats with Greek Prime Minister Alexis Tsipras, during their meeting in Athens, on Wednesdsay, Nov. 2, 2016. Lavrov is in Greece on a two-day official visit. (AP Photo/Petros Giannakouris)]ATHENS, Greece (AP) — Russia's foreign minister accused other countries involved in Syrian peace negotiations of having "sabotaged" the process with continued backing of militant groups intent on toppling President Bashar Assad.