A convoy of Kurdish Peshmerga troops departed from Turkey in a convoy overnight to help bolster Syrian Kurds holding out against self-styled Islamic State militants in the besieged town of Kobani.
Islamic State combatants have been trying to capture Kobani, known as Ayn al-Arab in Arabic, for over a month, pressing their assault despite U.S.-led air strikes on their positions and the deaths of hundreds of their fighters.
Islamic State militants are planning terror attacks in Europe and elsewhere, Prime Minister David Cameron has said.
Speaking exclusively to NBC News, Mr Cameron said there was "no doubt in my mind" that IS was to blame for the murder of four people at a Jewish Museum in Brussels in May and was planning further outrages in the West.
Satellite images have revealed the destruction in and around the town of Kobani, on the Syrian border.
Members of a prominent motorcycle gang from Holland have reportedly joined forces with Kurdish troops in Iraq to fight IS militants.
The sister of a UK journalist being held by Islamic State militants has appealed for his captors to reopen dialogue aimed at freeing him.