Putin signed a decree Saturday ordering the sanctions, which restrict Russian imports of some Turkish products, prohibit extensions of contracts for Turks working in Russia and affect the operations of Turkish companies in Russia.

　　The decree also calls for ending charter flights from Russia to Turkey and for Russian tourism companies to stop selling vacation packages that would include a stay in Turkey.

　　Russia has been threatening retaliatory measures against Turkey since the warplane was shot down Tuesday, an incident that has heightened tensions between the two countries.

　　Russia Putin Orders Sanctions Against Turkey

　　Earlier Saturday, Turkish President Recep Tayyip Erdogan voiced regret about the downing of the Russian plane, saying his country was "truly saddened" by the incident and wished it had not occurred.

　　Addressing his supporters Saturday in the province of Balikesir, Erdogan said he hoped tensions between Turkey and Russia over the incident do not escalate further and lead to dire consequences. He also said he hoped something like this does not happen again.

　　Erdogan also renewed a call to Putin for a face-to-face meeting in Paris on the sidelines of the global climate summit on Monday. Putin, who reacted angrily to the downing of the Russian fighter jet, has yet to agree to the talks.

　　Also Saturday, Turkey advised its citizens to delay nonurgent travel to Russia. Turkey's foreign ministry said it issued the travel warning because of unspecified "difficulties" faced by Turkish visitors and residents in Russia.

　　Turkey said it issued repeated warnings that the plane was in its airspace before shooting it down. Russia, which has been carrying out airstrikes in Syria since September, said the jet did not cross into Turkey.

　　The plane crashed into a mountainside in a rebel-held area in Syria. Both pilots parachuted out of the burning aircraft after it was struck, but one was found dead in Syria while the second was found safe and unhurt. A Russian soldier was killed in a rescue operation.

　　Putin said the downing of the plane was an act of betrayal by a country Russia had thought of as a friendly state. He also said the United States knew the jet's flight path and should have informed Turkey, its NATO ally.

　　The dispute is threatening Turkish-Russian ties and raising fears of a wider international conflict. The two countries are on opposite sides in the Syrian civil war.