Nabucco is an important project for Azerbaijan, Turley and Europe but it's entailing a number of problems, former Turkish Foreign Minister Hikmet Cetin said.

"Baku-Tbilisi-Ceyhan oil pipeline was put into operation thanks to titanic efforts of late Azerbaijani President Heydar Aliyev. His son, Ilham Aliyev is now enthusiastic about Nabucco but in this case not all depends on Azerbaijan," he said.

"If the U.S. acts as engine of the project, it will be launched," Cetin said.