According to Bangalore Metro Rail Corporation Limited, the TBM started the tunnelling from Lakkasandra station on April 21
https://www.thehindu.com/news/cities/bangalore/namma-metro-tunnel-boring-machine-vamika-achieves-breakthrough-after-tunnelling-721-metres-in-bengaluru/article67251597.ece
With the latest breakthrough, total 17.62 km (out of 20.991 km) of underground tunnelling has been completed on the Reach 6 Line of Phase 2.
https://www.thehindu.com/news/cities/bangalore/namma-metro-tunnel-boring-machine-vamika-achieves-breakthrough-after-tunnelling-721-metres-in-bengaluru/article67251597.ece
TBM emerges at Langford Town station after tunnelling 721 metres in BengaluruÂ
www.thehindu.comWith the latest breakthrough, total 17.62 km (out of 20.991 km) of underground tunnelling has been completed on the Reach 6 Line of Phase 2.