The US State Department declared about its decision to suspend bilateral channels with Russia on Syria.
On the occasion the US State Department Press Office Director Elizabeth Trudeau noted:
Unfortunately, Russia failed to live up to its own commitments, including its obligations under international humanitarian law and UNSCR 2254, and was also either unwilling or unable to ensure Syrian regime adherence to the arrangements to which Moscow agreed. Rather, Russia and the Syrian regime have chosen to pursue a military course inconsistent with the cessation of hostilities as demonstrated by intensified attacks against civilian area, targeting of critical infrastructure such as hospitals, preventing humanitarian aid from reaching civilians in need.
As noted in the statement, the U.S. will also withdraw personnel that have been dispatched in anticipation of the establishment of the Joint Implementation Center. To ensure the safety of our respective military personnel and enable the fight against Daesh, the U.S. will continue to utilize the channel of communications established with Russia to de-conflict counterterrorism operations in Syria."