The British government says it welcomes and agrees with the U.S. assessment that Syrian President Bashar Assad has used chemical weapons against opposition forces.

British Foreign Secretary William Hague said Friday the U.K. agrees with the U.S. assessment that chemical weapons, including sarin gas, have been used.

The U.K. and France both presented evidence of chemical weapons use in Syria to the United Nations, urging that investigators be allowed unfettered access to sites on the ground.

Hague said in a statement Friday that the crisis in Syria demands a strong and coordinated response, adding that the international community must "be prepared to do more."

The U.N. on Thursday raised the overall death toll in Syria's civil war to nearly 93,000.