Negotiations on a key intergovernmental agreement on the European Union's Nabucco pipeline have been completed and an agreement will be signed July 13 in Ankara, the Austrian government confirmed Monday.

"I'm very pleased that the negotiations have come to such a constructive end," Austria's economics and energy minister Reinhold Mitterlehner said.

The minister added, "the project Nabucco is not directed against Gazprom or other projects, but should be seen as complementing Russian gas," the minister said in a statement.

Nabucco pipeline is due to bring gas from the Caspian Sea to Austria via Turkey, Bulgaria, Romania and Hungary. Azerbaijan as a possible supplier country is involved in the current talks.

-By Frankfurt Bureau, Dow Jones Newswires; +49 69 29725 500; djnews.frankfurt@dowjones.com