Senior foreign executives of major telecommunications firms in Myanmar have been told by the junta that they must not leave the country without permission, a person with direct knowledge of the matter said.

A confidential order from Myanmar’s Posts and Telecommunications Department (PTD) in mid-June said senior executives, both foreign nationals and Myanmar citizens, must seek special authorization to leave the country, the person said.

A week later, telecom companies were sent a second letter telling them they had until July 5 to fully implement intercept technology they had previously been asked to install to let authorities spy on calls, messages and web traffic and to track users by themselves, the source said. Reuters has not seen the orders.