Raipur: Bus drivers and operators have gone on strike. Driver operators of buses running from Mantralaya have sat on a dharna at Amanaka depot. The bus driver-operator is demanding to pay 3 months’ salary during the lockdown last year. Meanwhile, the patients of corona infection have started increasing again in the state. Night curfew has been announced in districts with an infection rate of 4 per cent or more. The infection rate is more than 4% in Raipur, Durg, Bilaspur and Raigarh. Therefore, along with the night curfew in these districts, schools, Anganwadi centres have been closed with immediate effect.