THE Monetary Authority of Singapore (MAS) has instructed Citibank and DBS to conduct a “thorough investigation” into a recent disruption of numerous online services, and said it will take “appropriate supervisory actions after gathering the necessary facts”.

This comes after a technical issue at an Equinix data centre in Singapore led to the disruption of services last Saturday (Oct 14), including those of Citibank and DBS.

An MAS statement on Thursday night said that both DBS and Citibank activated their back-up data centres when their primary data centres failed to perform normally.