Singapore

The government had previously said data collected by its widely used app would only be used for contact tracing. The program is seen as a key part of the country's success in managing the coronavirus.

The man had undergone mandatory testing before embarking on the ship. But after the journey was cut short, the man tested negative twice as authorities sought to confirm his status.

Singapore reported 1,426 new cases on Monday and now has the highest number of reported cases in Southeast Asia. Most of those recently infected are foreign workers staying in cramped dormitories.

The country, which has won praise for its handling of the pandemic, has adopted strict new measures that could mean months behind bars for folks who fail to stay more than three feet apart.