Tributes to the dead and prayers for the 34 injured including 27 students, acrobats with a Nefteyugansk sports club.
Suspect Evgeny Bukharin, 40, married father-of-two, detained by police in Kemerovo region.
Dashcam video released by police shows how family took wrong turn and car plunged into Lake Baikal.
Giant sinkhole threatens more homes as it widens each week.
Deaths - and attempts - may be linked to barbaric 'games' encouraging young people to take their own lives.
Wind brought down power lines but one week later some locals are freezing as thermometers plunge to minus 20C.
Videos capture trend of youngsters racing in front of traffic, often with tragic consequences.
Masked assailant believed to be 9th grade student wielded axe in class ‘cutting off boy’s finger and wounding girl’.