KIEV, June 25 - Prime Minister Yulia Tymoshenko said Wednesday her government will strongly oppose resumption of the production sharing agreement with U.S. oil firm Vanco Energy, indicating her clash with President Viktor Yushchenko will accelerate.

Tymoshenko for a week has been ignoring Yushchenko’s order to resume the PSA with Vanco to let the company start searching for oil and gas offshore the Black Sea.