The underground stretch is expected to take 12 months for track laying to be complete. Tunnelling work has started, while the TBM, Marg-arita, recently completed tunnelling up to Minsk Square.
Tunnel-ling of the remaining 220m is taking place near City Railway station.
The first deadline of 42.3km of Phase 1 was June 2013. It was then pushed to June 2014, then December 2014. The deadline now stands at March 2015.
