The United States plans to reopen a Cold War-era military base in southern Greenland and set up a military presence at Mestersvig, an east coast outpost now used by the Sirius Dog Sled Patrol, the Danish special forces unit that enforces sovereignty on the island, according to Reuters, which cites three people familiar with the talks.

Both sites are part of the agreement the US, Denmark and Greenland sign on Tuesday at 10:30 a.m. ET on the sidelines of the UN General Assembly, according to The Jerusalem Post, which cites a White House official. Narsarsuaq, home to the Bluie West One base that Washington closed in the 1950s, now has a few dozen residents. The text of the agreement has not been released and the details will only be settled at signature; the Danish and Greenlandic governments and the White House did not respond to requests for comment, according to Reuters. Danish Foreign Minister Lars Lokke Rasmussen told TV2 that Arctic security will not rest with Danes and Americans alone and that, to a large extent, NATO will look after the Arctic. During the Cold War the US kept 17 military installations and more than 10,000 personnel on the island; today only Pituffik Space Base remains, with about 150 troops.