Donald Trump’s special envoys Steve Witkoff and Jared Kushner are planning to visit Moscow and Kyiv in the coming days to press for a diplomatic solution to the Russia-Ukraine conflict, a US official told CNN Friday.

The visit to the Ukrainian capital would mark the envoys’ first trip to the country that has been at war for years and under a steady barrage of Russian attacks in recent weeks. They have visited Moscow in the past.

Citing unnamed sources, Russia’s state-run news agency TASS reported on Friday that the visits would happen on September 5 and 6.