I have Done extensive research about the ethnicity of the rus and their raid(s) on constantinople
The Rus'–Byzantine Treaties give a valuable insight into the names of the Rus'. Of the fourteen Rus' signatories to the Rus'–Byzantine Treaty in 907, all had Norse names
According to F. Donald Logan, "In 839, the Rus were Swedes; in 1043 the Rus were Slavs."
When the Varangians first appeared in Constantinople (the Paphlagonian expedition of the Rus' in the 820s and the Siege of Constantinople in 860), the Byzantines seem to have perceived the Rhos (Greek: Ῥώς) as a different people from the Slavs. At least no source says they are part of the Slavic race.
en.m.wikipedia.org
The early parts of this article also hints at them being swedish.
So, the rus, including their role in their first two attacks om constantinople were mainly swedish/Norse right? (Until the late 10th or early 11th century)