KIEV, March 31 – The volume of imports of some petroleum products to Ukraine from 2007 to 2010 was enough to cause damage to national producers and was threatening to the energy security of the country.

This is stipulated in preliminary results of an investigation into fuel imports, a well-informed source in the government has told Interfax-Ukraine.

"The results of the investigation show that it is necessary to impose duties to increase the energy security of the country," he said.