"The PM extends his deepest condolences to the families of those who lost their lives in the accident in East Champaran district, Bihar.
"The PM is saddened by the loss of lives due to the autorickshaw-express train accident," the PMO said in a tweet.
Twenty persons, including eight children, were killed when an express train rammed into a packed autorickshaw at a railway crossing between Semra and Sugauli stations in East Champaran district.
The mishap took place at a manned railway crossing in Chinauta village when the Dehradun-bound Rapti-Ganga Express hit the autorickshaw at full speed, the police said.