The authority says it is monitoring the situation closely after SingPost sacked three top executives over their handling of the internal investigations into a whistleblowing report. SINGAPORE: The Infocomm Media Development Authority (IMDA) has issued an advisory to Singapore Post to "uphold proper governance and processes" after the company sacked three top executives over their handling of internal investigations into a whistleblowing report. In response to CNA's queries, IMDA said on Monday (