State-run agencies have bought 11.92m tonnes of wheat from farmers so far this season, down 25% on the 15.92m tonnes bought in the same period a year ago
The bus was heading to Sainj when its plunged into the gorge near Kullu's Jangla village around 8:30 am on Monday, authorities said.
Rescue efforts are currently underway and the injured are being rushed to a nearby hospital, said Kullu Deputy Commissioner Ashutosh Garg.
At least 40 students were on the bus when the accident took place, broadcaster NDTV reports.
The Prime Minister's Office later tweeted that the families of those killed in the accident would receive a compensation of Rs 200,000 each.