Turkey refused to apologize for shooting down a Russian warplane as Moscow fleshed out its list of sanctions planned in response.

Speaking at a news conference in Brussels on Monday after meeting with the secretary-general of the North Atlantic Treaty Organization, Turkish Prime Minister Ahmet Davutoglu said Ankara was ready for talks with Moscow “at any level” but defended Turkey’s actions.

“Protection of Turkish airspace, Turkish borders, is a national duty, and our army did their job,” he said. “No country can ask us to apologize.”

In Moscow, Prime Minister Dmitry Medvedev said Russia would halt importing fruit and vegetable from Turkey, laying out the details of sanctions announced Saturday in a Kremlin decree signed by Russian President Vladimir Putin.

Russia warned that sanctions could be expanded if Turkey failed to meet Russian demands, led by an apology. “It’s just the first step,” Mr. Medvedev said.