Mumbai-Ahmedabad bullet train: The breakthrough in the first mountain tunnel in the Mumbai-Ahmedabad high speed rail corridor, popularly called the bullet train, was achieved on Thursday in Valsad in Gujarat, the National High Speed Rail Corporation Limited (NHSRCL) said, according to the PTI.

The news agency reported, The tunnel, which is located some 1 kilometre away from Zaroli village in Umbergaon taluka in Valsad in the neighbouring state, was completed in 10 months using the New Austrian Tunnelling Method (NATM), the NHSRCL release said.