A newly unveiled memo from former British intelligence agent Christopher Steele details Russian assertions that the Kremlin intervened to block President Donald Trump’s choice of Mitt Romney for secretary of state.

The Steele memo, described in a New Yorker magazine article, is based on “a senior Russian official” who said he’d heard talk within the Russian Ministry of Foreign Affairs. The memo said the Kremlin, through unspecified channels, had asked Trump to appoint someone who’d be prepared to lift Ukraine-related sanctions and who would cooperate on security issues of interest to Russia.