(Reuters) -The U.S. has been helping Ukraine mount long-range strikes on Russian energy facilities for months in a joint effort to weaken the economy and force President Vladimir Putin to the negotiating table, the Financial Times reported on Sunday.

U.S. intelligence has helped Kyiv strike important Russian energy assets, including oil refineries, far beyond the front line, the newspaper said, citing unnamed Ukrainian and U.S. officials familiar with the campaign.

The White House, Ukrainian President Volodymyr Zelenskiy’s office and Ukraine’s foreign ministry did not immediately respond to Reuters requests for comment. There was no immediate comment from the Russian foreign ministry.

Moscow said this month that Washington and its NATO alliance were regularly supplying intelligence to K

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