The naval strikes on Wednesday were the first known operational use of state-of-the-art SSN-30A Kalibr cruise missiles, which were still being tested by the Russian navy this August.
President Vladimir Putin said the strikes spoke to the professionalism of Russia's revamped army.
"We know how difficult it is to carry out this kind of anti-terrorist operation," Putin told Shoigu. "Of course it is early to draw conclusions. But what has been done so far deserves a highly positive assessment."
The strikes came as the Syrian troops backed by Russian airpower launched their first major ground offensive since Moscow began its intervention in the conflict last Wednesday.
News reports and video of fighting uploaded to the Internet on Wednesday showed that the Syrian army was moving from the city of Hama toward Idlib, a stronghold held by a coalition of mostly Islamist rebels.
While the Kremlin's stated aim in the conflict is to fight the Islamic State in Syria, the United States and its allies say that Russia is concentrating its firepower against other rebel groups to prevent Assad from being overrun. One video on Wednesday appeared to show the Free Syrian Army, a moderate force backed by the West, firing antitank missiles at government troops advancing with Russian air support.
In televised remarks on Wednesday, Putin encouraged the Free Syrian Army to join in an alliance with Assad's troops against the Islamic State. At the same time, he belittled the influence of moderate rebels on the conflict.
"True, we don't currently know where it is and who is leading it," Putin said of the Free Syrian Army.
Russian news reports on Wednesday said that Syrian forces had launched a heavy artillery bombardment and were moving toward Idlib but added that it was not yet clear how far the Syrian troops had advanced.
The news reports also said that Syrian troops had used advanced rocket launch systems similar to the ones that Western officials claimed that Moscow had shipped to Syria last week.
In a video posted to YouTube from the town of Kafranboudah, in the western part of the Hama countryside, a Syrian rebel commander said government forces began shelling his unit's position on the frontline early Wednesday morning. Kafranboudah is about 16 miles east of Latakia province, a Syrian regime stronghold. More than a dozen rebel groups formed a coalition to oust government forces from Hama in August.
Regime soldiers on Wednesday stormed the town from three sides with Russian air support, the commander said, and the fighting has extended nearly 20 miles southeast to the town of Maan. He did not say whether his fighters had suffered any losses, but said Syrian rebels had destroyed at least four regime tanks with antitank missiles.
The West, which has launched more than 7,000 airstrikes against the Islamic State in the past year, has bristled at Moscow's military buildup in Syria. Russia has deployed surface-to-air missiles, fighter jets, and radar jamming equipment to the region that officials say is meant to interfere with Western forces.
On Tuesday, U.S. and Russian officials seek to resume talks on how to coordinate in the skies over Syria. Turkey, a NATO member that shares a border with Syria, has already accused Russia of violating its airspace.
In Rome, Defense Secretary Ashton B. Carter did not respond directly when asked by reporters about the Russian military's apparent support for the Syrian government's ground offensive.
But the Pentagon chief for the first time ruled out any cooperation with Moscow in the fight against Islamic State, saying that Russia's strategy was clearly just to support Assad and his government.
"We believe Russia has the wrong strategy. They continue to hit targets that are not ISIL. This is a fundamental mistake," Carter said, using one of the acronyms for the Islamic State.
In the past, the Obama administration has publicly held out hope -- however faint -- that Moscow might cooperate in the military campaign against the Islamic State.
In his most hard-line comments to date about Russia, Carter rejected the possibility of teaming up with the Russians in that regard. He said the Pentagon still wanted to talk with Moscow about finding ways to manage the crowded airspace above Syria and avoid any hostile or inadvertent encounters. "That's it," he said flatly.
There have been no reported close encounters or unsafe incidents involving U.S. and Russian warplanes so far in Syria, according to a senior U.S. defense official who spoke on the condition of anonymity to discuss military operations.
Russian aircraft have "come closer" to American drones on at least one occasion, the official said, but it was not a dangerous incident.
"Certainly they are in similar battlespace so they see each other and they are aware of each other," the official said of Russian and U.S. warplanes.
Pentagon officials have said the Russian intervention in Syria has not forced the U.S. military or its coalition partners to alter the rate or location of their surveillance missions and airstrikes against Islamic State.
The two sides have jousted in recent days over the conditions for holding another round of talks. Washington wants to limit the discussion to technical factors about aviation safety, while Moscow has said it wants a broader conversation about possibly coordinating military operations - something the Pentagon steadfastly opposes.
The senior U.S. defense official said the Pentagon drafted a document last week for the Russians that lays out "basic rules of flight conduct," such as what language and radio frequencies pilots would use in a hostile or inadvertent encounter.
The Russians have not responded to any of the particulars, the official said.
- The Washington Post
