Danish soldiers flown to Greenland in January were prepared to blow up key airport runways over fears that US President Donald Trump could invade the Arctic island, Denmark's public broadcaster DR says. Citing sources in the Danish government and military, and also among European allies, DR states that blood supplies were also brought in to treat the wounded in the event of fighting. The Financial Times newspaper confirmed the report through two European officials. The Danish defence ministry told the BBC it has no comment. A senior Danish military official, speaking anonymously, told the BBC only a limited number of people would have been aware of the operation for security reasons. Both the US and Denmark are NATO members, and the issue of Greenland—a semi-autonomous part of Denmark—has significantly divided Washington and its European allies. Trump has repeatedly claimed that he wanted to annex Greenland during his second presidential term, with Greenland's leader and Denmark continuously rejecting his demands. DR reported that military preparations escalated following a US operation in Venezuela, as Denmark sought assurance from its allies about potential actions against US aggression. The Danish-led military exercises, termed Operation Arctic Endurance, were actually precautionary measures to counter a perceived US threat during Trump's presidency.