RUSSIA — Russia sent an advanced missile system to Syria on Wednesday to protect its jets operating there and pledged its air force would keep flying missions near Turkish air space, sounding a defiant note after Turkey shot down a Russian fighter jet.

Underscoring the message, Russian forces launched a heavy bombardment against insurgent-held areas in Latakia on Wednesday, near where the jet was downed, rebels and a monitoring group said.

President Tayyip Erdogan made no apology, saying his nation had simply been defending its own security and the “rights of our brothers in Syria.” He made clear Turkish policy would not change.

Russian officials expressed fury over Turkey’s action and spoke of retaliatory measures that were likely to include curbing travel by Russian tourists to Turkish resorts and some restrictions on trade.

Russian Foreign Minister Sergei Lavrov described it as a planned act and said it would affect efforts towards a political solution in Syria. Moscow would “seriously reconsider” its relations with Ankara, he said.

Jets believed to be Russian also hit a depot for trucks waiting to go through a major rebel-controlled border crossing with Turkey, Bab al-Salam, the head of the crossing said.

Syrian jets have struck the area before, but if confirmed to have been carried out by Russia, it would be one of Moscow’s closest air strikes to Turkish soil, targeting a humanitarian corridor into rebel-held Syria and a lifeline for ordinary Syrians crossing to Turkey.

But the Russian response was carefully calibrated, indicating Moscow did not want to jeopardize its main objective in the region: to rally international support for its view on how the conflict in Syria should be resolved.

“We have no intention of fighting a war with Turkey,” Lavrov said. Erdogan also said Ankara had no intention of escalating tensions with Russia.

Kremlin spokesman Dmitry Peskov said Russia was forced to fly missions close to the Turkish border because that was where the militants tended to be located. Russian operations would continue, he said.

Turkey said the downed jet had encroached on Turkish air space and was warned repeatedly to change course, but Russian officials have said the plane was at no time over Turkey.

The crew ejected and one pilot was shot dead by rebels as he parachuted to the ground. A Russian marine sent to recover the crew was also killed in an attack by rebels.

Russia made clear it could target Turkey economically.

“The direct consequences could lead to our refusal to take part in a whole raft of important joint projects and Turkish companies losing their positions on the Russian market,” Medvedev said in a statement.