DUBAI, Nov 24 (Reuters) - Iranian Supreme Leader Ayatollah Ali Khamenei said on Sunday the deal reached with world powers in Geneva was the basis for further progress, and the prayers of the Iranian nation had contributed towards its success.

"This can be the basis for further intelligent actions. Without a doubt the grace of God and the prayers of the Iranian nation were a factor in this success," Khamenei wrote in a letter to President Hassan Rouhani published by the IRNA state news agency. (Reporting By Jon Hemming)