Russian President Vladimir Putin received former U.S. Secretary of State Henry Kissinger in the Kremlin on Thursday, the Kremlin said in a statement.

It did not elaborate on what the two men discussed, saying only that Kissinger was in Russia for the Primakov Readings, an annual forum of experts, diplomats and politicians.

Kissinger met U.S. President Donald Trump last month, and Putin and Trump are expected to meet on the sidelines of the Group of 20 summit in Germany next week, in what would be their first face-to-face meeting since Trump became president.