SINGAPORE, May 7 -- Fans of global K-pop sensation BTS, known collectively as Armys, are abuzz with speculation that member Jin may have secretly filmed a music video (MV) in Singapore.

According to a report in Channel News Asia (CNA), the speculation began after Jin launched an interactive online game to promote his upcoming mini album Echo, which is set for release on May 16.

In the game, which can be found here, players enter numerical codes to "call" Jin and unlock exclusive images.

The discovered codes - 53283 (Leave), 78278 (Start), and 4878 (Hurt) - each unlocked a different image, according to the report.

All three images reportedly feature recognisable Singapore landmarks: Goldhill Plaza (Leave), Cloud Forest at Gardens by th...