A school bus plunged off a mountain road into a deep gorge in the Himalayan foothills, killing 23 children, some as young as 4, Indian officials said.
Four adults also died, said Sandeep Kumar, a local official.
Ten children were in hospital.
Initial reports indicated the bus driver was speeding as he took the children home and lost control at the edge of the gorge.
The bus fell some 60m to the ground below, said police officer Sunil Kumar.