U.S. Secretary of State Rex Tillerson said on Friday that the United States was demanding "the immediate release" of two Reuters reporters arrested in Myanmar "or information as to the circumstances around their disappearance."

The United States joined mounting demands for the reporters to be freed. The United Nations, United Kingdom, Sweden and Bangladesh, among others, have denounced the arrests.

The journalists, Wa Lone, 31, and Kyaw Soe Oo, 27, went missing on Tuesday after being invited to meet police officials over dinner on the northern outskirts of the city of Yangon. They had worked on stories about a military crackdown in Rakhine state, which has triggered the flight of more than 600,000 Rohingya Muslims to Bangladesh since late August.