It was not immediately clear what prompted the arrests and police inspections, and 7x7 said it was not known whether Opolcheniye 31’s leader, Vadim Tarasenko, was under formal investigation.

Tigers skipper Kyle Howarth taking what looked like a nasty fall in the last lap of heat eight, as he attempted to overtake Vadim Tarasenko. Tarasenko appeared to have broken down, leaving Howarth ...