By Alice Truong for Quartz

Major world powers, including the US and Russia, have agreed to a nationwide “cessation of hostilities” in Syria and to permit the immediate delivery of humanitarian aid, US Secretary of State John Kerry.

Speaking from Munich early Friday (Feb. 12), Kerry stopped short of calling the agreement a ceasefire, but said the aim is to stop the fighting “in one week’s time.” Russia agreed to end some of its airstrikes that have reportedly killed hundreds of civilians. The timing appears to be a compromise between a Russian ceasefire date of March 1 and earlier US demands that the fighting stop “immediately.”

But the agreement does not apply to terrorist organizations, including ISIL and al-Nusra Front, who have not been part of the “International Syria Support Group” of nations. Even the ceasefire’s main negotiators signaled it was tentative.