MOSCOW, December 4. /TASS/. The Kremlin regrets that Russia and the United States have so far not been very successful in developing bilateral dialogue, despite the "homework" on either side, Russian Presidential Spokesman Dmitry Peskov has said.

"The dialogue has indeed stalled, in spite of certain plans and certain homework on either side," he said.

Peskov stressed that decisions to hold bilateral contacts had been "reversed at the last moment" on numerous occasions, "despite the existence of a range of very important, strategically important issues." "This is regrettable," the Kremlin spokesman concluded.

Russian President Vladimir Putin and his US counterpart Donald Trump were to have negotiations at the G20 summit in Buenos Aires held from November 30 to December 1. However, on Thursday, the US president tweeted that he had decided to cancel his meeting with Putin in the wake of the Kerch Strait incident.

Nevertheless, Putin talked briefly to his US counterpart on the sidelines of the G20 summit in Argentina.