Russia has sent advanced anti-ship cruise missiles to Syria, The New York Times reports.
American officials told the US-based paper that the most recent shipment from Russia contains an advanced radar system that makes them more effective.
The weapons, called Yakhonts, could enable the Assad regime to counter any international attempts to impose a naval embargo, or establish a no-fly zone, according to experts.
More top news
Three men gored and 10 others hospitalised during first day of a week-long San Fermin festival in the northern Spanish city of Pamplona.
People travelling into the capital have been getting off a stop early to walk together in remembrance of the victims of the 7/7 bombings.
Olympian Dawn Fraser has been accused of racism after saying tennis player Nick Kyrgios should "go back" to where his parents came from.