An Indonesian anti-graft group has raised suspicions that one of the Republic’s most wanted corruption suspects, oil tycoon Riza Chalid, remains in Malaysia pending execution of an Interpol red notice and deportation.

Masyarakat Anti-Korupsi Indonesia (Maki) spokesperson Boyamin Saiman said there had been no further indication that Riza had left Malaysia, where the 66-year-old billionaire was last believed to reside, according to news reports up to December last year.

“He was previously suspected of...