Construction of the plant was started in 1975 by German companies, but the work was stopped in 1979 after the Islamic revolution of Iran. The site was repeatedly bombed during the Iran–Iraq war. Later, a contract for finishing the plant was signed between Iran and the Russian Ministry for Atomic Energy in 1995, with Russia's Atomstroyexport named as the main contractor. The work was delayed several years by technical and financial challenges as well as by political pressure from the West. After construction was again in danger of being stopped in 2007, a renewed agreement was reached in which the Iranians promised to compensate for rising costs and inflation after completion of the plant. Delivery of nuclear fuel started the same year. The plant started adding electricity to the national grid on 3 September 2011, and was officially opened in a ceremony on 12 September 2011, attended by Russian Energy Minister Sergei Shmatko and head of the Rosatom Sergey Kiriyenko.