KIEV, Sept. 13 ??“ Russian oil major Lukoil postponed for at least a month restart of its huge Ukrainian petrochemical company as growing crude oil prices make its operation unprofitable, a company official said Tuesday.

Lukor, the petrochemical joint venture in which Lukoil owns 52% stake, was supposed to resume operation in early September, but the high oil prices will keep it shut until early October, the official said.