The Gulf Arab nations and the European Union pledged Sunday to pool their efforts to help convene a peace conference on Syria, as they wrapped up a one-day ministerial meeting in Bahrain.

The gathering attended by EU foreign policy chief Catherine Ashton and the foreign ministers of the six-nation Gulf Cooperation Council also called on Shiite Iran to play "a constructive role" in the Sunni-dominated region.

The ministers "reiterated the utmost urgency of finding a political settlement of the Syrian conflict," said a statement issued at the end of the meeting.

They also pledged to "spare no effort in helping to create the appropriate conditions for a successful convening of the peace conference on Syria" which Russia and the United States have been striving to hold in Geneva.

The GCC and the EU also took a swipe at Lebanon's Shiite militant movement Hezbollah which backs the Damascus regime in the 27-month conflict and "condemned" its role "in military operations in Syria".

The statement, however, made no mention of demands by Syria's armed opposition for weapons to fight the regime of President Bashar al-Assad -- a request that has also the backing of GCC powerbrokers Qatar and Saudi Arabia.

Ashton told the gathering "we need to work harder together to find the political solution that will bring peace" to Syria and expressed concern about a spillover of the war into neighbouring Lebanon and Iraq.

"We are extremely concerned about the plight of the people and about rising sectarian conflicts in Lebanon and Iraq, and we want to do our utmost to try and defuse tension," she said.

On Iran, the GCC -- whose members also include Bahrain, Kuwait, Oman and the United Arab Emirates -- and the EU expressed support for diplomatic efforts to end the row over Tehran's nuclear programme.

They also urged Iran "to play a constructive role" in the Sunni-majority region where GCC leaders have repeatedly accused the Islamic republic of undermining stability.

On the economic front, Ashton said bilateral trade between the EU and the GCC increased by 45 percent since 2010 and was worth 145 billion euros annually ($188 billion).

On Saturday, the European Union said the "promotion of human rights" was among issues Ashton would raise at the meeting to review economic ties and regional developments.

Human Rights Watch issued statement on the occasion of the meeting urging Ashton to press Bahrain to release 13 opposition activists jailed in the Sunni-ruled but Shiite-majority Gulf state.