US President Donald Trump’s envoys, Steve Witkoff and Jared Kushner, arrived in Moscow on Thursday to discuss recent US-mediated peace negotiations with Russian President Vladimir Putin.

The diplomats recently concluded two days of talks between Russian and Ukrainian delegations in Abu Dhabi, United Arab Emirates. According to reports on the negotiations, the discussions ended on Wednesday with an agreement for a major prisoner-of-war exchange, though they yielded no apparent breakthrough toward ending the nearly five-year conflict.