NBC's Jim Miklaszewski reports that a Russian military ship carrying troops is on its way to Syria to protect a Russian deep water port.
Russia is sending armed troops to Syria amid escalating violence there, United States military officials told NBC News Friday, in a move certain to frustrate Western efforts to put pressure on the regime of President Bashir Assad.
Moscow has sent a ship carrying a small contingent of combat forces to guard Russia’s deep-water port and military base at the Syrian city of Tartus, the US officials said.
The U.S. officials also said Russia has not sent additional attack helicopters to the Syrian government, but replacement parts for the Russian helicopters the Syrians are already flying.
Days before President Barack Obama's meeting with Russian President Vladimir Putin, there has been a war of words between the U.S. and Syria's longtime military supplier. NBC's Andrea Mitchell reports.
It comes after the conflict was declared by France on Wednesday to be a full-blown civil war.
The head of the U.N. observers in Syria said Friday a recent spike in bloodshed is derailing the mission to monitor and defuse more than a year of violence and could prompt the unarmed force to pull out.
"Violence over the past 10 days has been intensifying willingly by the both parties, with losses on both sides and significant risks to our observers," Maj. Gen. Robert Mood told reporters in Damascus. "The escalating violence is now limiting our ability to observe, verify, report as well as assist in local dialogue and stability projects."
Tartus is one of Russia’s most strategically-important assets, giving it military access to the Mediterranean Sea.
Russia and China, both permanent members of the U.N. Security Council with veto power, frustrated attempts by key Western figures, including Secretary of State Hillary Clinton, to enforce a United Nations peace plan brokered by special envoy Kofi Annan.
Russia’s foreign minister Sergei Lavrov on Friday repeated Moscow's strong opposition to external interference in Syria, said it was not discussing plans for a Syrian political transformation following the exit of Assad.
At a news conference after talks with his Iraqi counterpart, Lavrov said he had seen reports saying U.S. State Department spokeswoman Victoria Nuland had suggested Washington and Moscow were discussing a post-Assad strategy in Syria.
"If that was really said then it's not true," Lavrov said. "Such discussions are not being held and cannot be held, because to decide for the Syrian people contradicts our position completely.
"We do not get involved in overthrowing regimes - neither through approval of unilateral actions by the U.N. Security Council nor by participation in any political plots."
Nuland was asked at a news conference on Thursday whether the United States and Russia were discussing a transition of power similar to that seen in Yemen last year, in which President Ali Abdullah Saleh was replaced by a deputy.
"We are continuing to talk about a post-Assad transition strategy in that context," she said.
Government forces in Syria have driven rebel fighters out of the town of Haffa near the Turkish border and are now allowing UN monitors to enter the area. NBC's Richard Engel reports.
Lavrov said any broad international talks on Syria must include Iran and must only address ways to create conditions for a political dialogue in Syria - not the content of that dialogue or preconditions such as Assad's exit.
Russia, which has come under increasing criticism from the West for arms deliveries to Syria, responded to U.S. Secretary of State Hillary Clinton's allegations that attack helicopters were on the way from Russia to Syria.
In a statement on the Foreign Ministry website, Russia said it had made no new deliveries of military helicopters to Syria but under old contracts it had repaired helicopters sent to Syria "many years ago".
"There are no new deliveries of Russian military helicopters to Syria. All arms industry cooperation with Syria is limited to a transfer of defensive arms," the ministry said on its website.
"As regards helicopters, planned repairs of (helicopters) delivered to Syria many years ago were conducted earlier," it said. It did not say when they had been repaired or, if they were repaired in Russia, when they were returned to Syria.
Syria's ambassador to Russia said on Thursday Russia had not sent new attack helicopters to Syria.
Russia says it is fulfilling existing contracts for air defense systems against external attacks. President Vladimir Putin, due to meet U.S. President Barack Obama next week, said the weapons Russia sends could not be used in civil conflicts.
A source close to Russia's arms exporting monopoly Rosoboronexport said Clinton's comments may have referred to helicopters sent to Russia in 2009 for repairs and which may be on the way back to Syria.
The source said on Wednesday at least nine Mi-25 helicopters were sent to Russia's Baltic exclave of Kaliningrad to be repaired by Oboronservis, owned by the Defense Ministry.
Russia delivered three different missile systems including Bastion anti-ship missile units and another anti-aircraft system to Syria last year.
At least two ships carrying Russian weapons have reportedly travelled to Syria since the beginning of the year, though possibly not on behalf of state arms exporter Rosoboronexport.
Reuters contributed to this report. Jim Miklaszewski is the chief Pentagon correspondent for NBC News.
More world news from msnbc.com and NBC News:
- Report: US expands secret 'shadow war' in Africa
- UK PM grilled over links to Rupert Murdoch's empire
- NBC's Richard Engel answers your questions on Syria
- Transgender pageant winner murdered in South Africa
- 'Maple Spring' student protests: Crackdown roils Quebec
- 'Forest boy' mystery: Stumped cops release photo
- Shot in the dark: Blinded sailor aims for Paralympics
- Survey: World's opinion of US, Obama slips
Follow us on Twitter: @msnbc_world