Angelina Jolie has visited Syrian refugees in Turkey to draw attention to the plight of the hundreds of thousands who have fled their nation's civil war.

The trip by the Hollywood star, the UNHCR's special envoy, and the agency's chief, Antonio Guterres, came amid concern in Turkey that the number of registered Syrian refugees on its soil - about 80,000 - is becoming difficult to manage.

Angelina drove through the gates of the Kilis camp near the Syrian border. Her meetings with refugees were closed to the media.

Her two-day itinerary in Turkey was also to include a stop in Ankara, the capital, for talks with officials including President Abdullah Gul.

Earlier this week, the Salt actress visited Syrian refugees in Jordan, which is also sheltering those who have fled the 18-month conflict in neighbouring Syria.

The UN refugee agency has said the number of Syrian refugees seeking its help now tops a quarter-million - and could be far higher.