The US State Department spokesman John Kirby said Kerry in a telephone call with Russian Foreign Minister Sergei Lavrov had welcomed the “constructive engagement” among members of the ISSG, “as parties continue to closely monitor and assess reports from the field.”
In the telephone call, “They agreed that while initial reports have been encouraging, a serious effort by all parties will be critical to success going forward,” Kirby added.
Lavrov and Kerry also discussed “ways for ensuring it (the ceasefire) is fully upheld, including enhancing military cooperation between Russia and the United States,” the Moscow statement said.
Steinmeier hopeful of truce
German Foreign Minister Frank-Walter Steinmeier told the ’Welt am Sonntag’ newspaper he was hopeful of the effects of the ceasefire: “The ceasefire was not agreed immediately, everywhere with 100 percent compliance,” he said. “But for the first time there is a chance of a real respite.”
With every hour that the truce holds, “the hope of peace in Syria rises for millions of Syrian people, not only in the country itself but also for those who have fled war and terror.”
The first major truce in the five-year civil war began at midnight (2200UTC) in Syria on Friday night.
The United Nations envoy Staffan de Mistura has said peace talks are to resume on March 7 if the ceasefire prevails and more aid is delivered to Syrian communities.

Source: AFP, dpa, 28 Feb 2016