As armored vehicles are being deployed in Myanmar’s major cities and workers are striking, U.S. citizens living in the Southeast Asia nation have been told to “shelter in place.”

Train service in some places has stopped, and power plant workers are trying to make sure the electricity stays on, Reuters reported on Saturday, citing local media. Armored vehicles have reportedly appeared in the cities of Yangon, Myitkyina, and Sittwe, in the military’s first large-scale rollout of such vehicles since the Feb. 1 coup.