"Undoubtedly, a number of countries interested in continuing the conflict will make titanic efforts to disrupt the planned meeting between President Putin and President Trump," he said in a post in his Telegram account, specifying that by efforts he meant "provocations and disinformation".

The announcement of the August 15 meeting came earlier in the day from Washington and Moscow, with both sides framing it as an opportunity to explore a negotiated end to the fighting.

The Russian president and Trump emissary held talks in Moscow days before the White House deadline for Russia to reach a peace deal with Ukraine.