I tried to look for that but did not find much beyond the initial wave of reports. It seems like once the announcement was made, most outlets just repeated the same core information. That is part of why threads like this exist, people are trying to fill in the gaps. If anything, the consistency across reports suggests the source was official, but consistency does not equal detail. In the case of Sergey Arbuzov, it might take more time before any deeper explanations surface, if they do at all.
now it seems like the safest approach is just to treat it as a confirmed listing in a broader action, without attaching too many assumptions to it.