Denmark deploys additional troops to Greenland after President Donald Trump claims the island is not secure from Russia or China.

Denmark is increasing its military presence in and around Greenland with immediate effect, according to a joint statement by the Danish Foreign Ministry and Greenland’s Ministry of Foreign Affairs and Research.

Denmark’s foreign minister said on Wednesday that a “fundamental disagreement” with U.S. President Donald Trump over the future of Greenland remained unresolved after high-level talks in Washington, even as Denmark and NATO allies moved to increase their military presence in the Arctic territory amid rising tensions.

President Trump’s recent threats to take over Greenland have renewed interest in the international agreement brokered more than 50 years ago that provides the U.S. with military access to the island.

Denmark has sent more soldiers and equipment to Greenland. This follows rising tensions from President Trump’s comments that the island is not secure. The military deployment highlights Greenland’s strategic importance.

The Danes say the deployment of aircraft, ships and soldiers is part of an ongoing effort to better protect the island and the Arctic.

Germany has withdrawn a small military reconnaissance team from Greenland as President Trump escalates pressure on Denmark over Arctic security.

Danish Royal Navy ships patrolled the coast of Greenland on Saturday looking for foreign vessels, after comments from U.S.

The Danish Ministry of Defence said Wednesday that it is ramping up its military presence around Greenland, and Sweden sent military officers to the island.

A promise to renegotiate a US-Denmark pact that governs American military bases in Greenland was at the core of discussions between Donald Trump and Nato’s secretary-general that led the US president to dial back his threats over the Arctic island.