Russia on Tuesday summoned the Israeli ambassador after a Russian plane was shot down over Syria, an incident Moscow has blamed on Israel's air force.
"The Israeli ambassador has been summoned to the foreign ministry over the situation," a ministry representative told AFP.
Ambassador Gary Koren's deputy Keren Cohen Gat, currently the charge d'affaires at the Israeli embassy, went to the foreign ministry on Tuesday for a meeting of about 30 minutes.
She refused to comment to media as she exited the building.
The Russian Il-20 warplane with 15 people on board was shot down by the Syrian air defence late Monday.
Russia's defence ministry said "full blame" rests with the Israeli aircraft which carried out strikes on Syria's Latakia province and "used the Russian plane as a cover".
Israel's military has expressed "sorrow" over deaths of Russian servicemen, though denied its planes had already left Syrian airspace when the Russian plane was taken down.
Defence Minister Sergei Shoigu discussed the matter with his Israeli counterpart Avigdor Lieberman on Tuesday, warning that Moscow could retaliate with unspecified "measures".