According to LTV, which did not disclose the source of the information, the raid took place February 16.
Reporters could not get confirmation of the development from either KNAB or from Rimšēvičs himself, who told LTV he "was not entitled to comment" and promptly hung up on them. His current whereabouts were not clear.
Telefonsarunā ar Latvijas Televīziju Ilmārs Rimšēvičs paziņoja, ka “nav tiesīgs to komentēt” un nolika klausuli. https://t.co/75RPmMWZfE— LTV Panorama (@ltvpanorama) February 17, 2018
Consequently it was not possible to ascertain whether Rimšēvičs himself was under investigation or whether the search of his office was linked to some other investigation.
Via social media KNAB said it "does not currently confirm or deny information about recent investigative activities" but said it would "provide additional information and clarification as soon as possible without compromising the investigation."
@KNABinforme šobrīd ne apstiprina, ne noliedz izskanējušo informāciju saistībā ar pēdējā laikā veiktajām izmeklēšanas darbībām.KNAB sniegs papildus ziņas un skaidrojumu tiklīdz tas būs iespējams, neapdraudot izmeklēšanu.Šobrīd lūdzam šo uztvert kā oficiālu paziņojumu. pic.twitter.com/kKhzuwB1NE— KNAB (@KNABinforme) February 17, 2018
Nevertheless the development is unprecedented. Rimšēvičs has been governor of the Latvian central bank since 2001 and has worked there since 1992. As Latvia is a member of the Eurozone he is also a member of the European Central Bank's governing council.
LTV also reported from anonymous sources that businessman Maris Martinsons, a well-known entrepreneur in construction and payday loans, was arrested by KNAB in what may be a linked development.
President Raimonds Vejonis announced late Saturday that the situation in the Latvian bank sector - with the central bank governor situation coming on top of the ABLV controversy - would be the subject of a meeting of the National Security Council next week.
Jautājums par situāciju Latvijas banku sektorā tiks skatīts nākošnedēļ ieplānotajā Nacionālās drošības padomes sēdē, @Vejonis— Valsts prezidents (@Rigas_pils) February 17, 2018