US Secretary of State Hillary Clinton has said she hopes fresh discussions about the Syrian crisis will help bring an end to bloodshed in the war-torn country.
As Mrs Clinton held talks with Russian foreign minister Sergey Lavroy and United Nations envoy for Syria Lakhdar Brahimi in Dublin, she warned that violence on the ground was accelerating, with pressure against the regime in and around Damascus increasing.
"We have been trying hard to work with Russia to stop the bloodshed in Syria and start a political transition towards a post-Assad Syria future," Mrs Clinton said.
Russia, one of Syria's closest allies, is believed to be key to quelling a 17-month-old uprising against President Bashar al-Assad in which 20,000 people have been killed.
Mrs Clinton said fresh reports the country may be on the verge of using chemical weapons would be discussed.
Elsewhere, Nato has approved Turkey's request for the deployment of Patriot anti-missile batteries along its border with Syria.
"We have made it very clear what our position is," Mrs Clinton added.
"With respect to chemical weapons, I think we will discuss that and many aspects of what needs to be done in order to end the violence and begin that transition I referred to."
The officials met while in the Irish capital for the Organisation for Security and Co-operation in Europe (OSCE), which was attended by more than 50 foreign ministers including Foreign Secretary William Hague.