STOCKHOLM (REUTERS) - A Swedish freelance journalist has gone missing in the Syrian-Turkish border area, the Swedish newspaper Expressen reported on Friday, without disclosing its sources.

The journalist was not identified but was described as in his 30s.

He had planned to enter an area of Syria controlled by Islamic State in Iraq and Syria militants via the Turkish town of Gaziantep but had not been heard of for four days, the paper reported.

A Swedish foreign ministry spokesman declined to comment.