UN under-secretary-general for humanitarian affairs and emergency relief coordinator Valerie Amos arrived in the Syrian capital.

UN under-secretary-general for humanitarian affairs and emergency relief coordinator Valerie Amos arrived in the Syrian capital of Damascus on Sunday for talks on humanitarian issues, Xinhua news agency reported.

Amos, during her two-day visit, will meet with Syrian officials from the Foreign Ministry, a UN source told Xinhua.

The visit, which is Amos' third one since the unrest in Syria began in 2011, came less than a week after a UN humanitarian delegation visited the hotspots in the conflict-engulfed country and warned of "shocking" and "appalling" situation.

The UN has recently said that about 4 million Syrians are in urgent need of humanitarian assistance, at least 2 million of them internally displaced.