The flow of critical United Nations aid from Turkey to northwest Syria has temporarily halted due to damage to roads and other logistical issues related to the deadly earthquake that struck the two countries on Monday, a U.N. spokesperson said.

"Some roads are broken, some are inaccessible. There are logistical issues that need to be worked through," Madevi Sun-Suona, spokesperson for the United Nations Office for the Coordination of Humanitarian Assistance (OCHA), told Reuters.

"We don't have a clear picture of when it will resume," she said. (Reporting by Timour Azhari; Editing by Andrew Heavens)