U.S. Secretary of State Hillary Clinton will attend the signing ceremony for protocols that would normalize relations between Turkey and Armenia, a senior U.S. official said on Thursday.

The accords will be signed in Zurich, Switzerland on Saturday following months of Swiss-mediated talks between Turkey and Armenia.

US Assistant Secretary Philip Gordon, responsible for Bureau of European and Eurasian Affairs, said that Clinton would attend the ceremony ahead of her European tour of Britain, Ireland and Russia.

Gordon said Clinton would demonstrate U.S. support to this historic step to resume diplomatic ties and open border between Turkey and Armenia.

Gordon also said that United States would always be ready to cooperate with both countries to support the process which he said would contribute to peace, security and stability in the region.

Another U.S. official, who spoke on condition of anonymity, said that United States had always encouraged parties to move forward and had been in touch with them.

This is a historic chance for both Turkey and Armenia, the official said.

The same official also said that Russian Foreign Minister Sergei Lavrov, French Foreign Minister Bernard Kouchner and EU's High Representative for the Common Foreign and Security Policy Javier Solana are also expected to attend the ceremony in Zurich.