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Akgul, 35, has seen "plenty of action" in more than a decade as a photojournalist with the AFP news agency – from war-torn Syria to IS-controlled Iraq.

The fact that he works for an international news agency, AFP, makes that message even louder, he believes.

Mikaela Engell, an expert on the Arctic territory who previously served as Denmark's High Commissioner to Greenland, told AFP news agency "it's very, very important and it's very reassuring for Greenlanders to see a Danish head of government."

The police chief told AFP: "A review of his GoPro camera footage showed his entry and landing into the restricted North Sentinel Island."

Andaman and Nicobar Islands' police chief HGS Dhaliwal told news agency AFP that "an American citizen" had been presented before the local court and was remanded for three days for "further interrogation".