North Korean construction crews have built a large worker camp in recent weeks in an exclusive area of Pyongyang where two large guesthouses for foreign leaders are located, according to NK Pro analysis of satellite imagery.

The size of the camp suggests a large project is or will soon be underway, although other signs of construction in the area, such as land clearing or demolition, have yet to emerge. The camp was built between Feb. 8 and 14 and grew larger by Feb. 21, Planet Labs imagery shows. 

The same patch of land was used to house a