The Blue Line connects Dwarka to Noida/Vaishali.
A senior Metro official said the first technical snag occurred around 3 pm. "Train services were affected due to signalling issue (loss of centralised view intermittently) on the Karol Bagh-Dwarka section," he said.
However, the snag recurred at around 7 pm at another section, and many passengers complained of delay in services.
A Twitter user who goes by the handle @sandeepissar wrote, “#DelhiMetro blue line metro from noida city center to nawada is running very slow. Its standing between two stations for 15 mins. (sic).”
Earlier in the day, the official said, "The view and control of the signalling and Automatic Train Control system on Blue Line (Dwarka Sec-21 to Noida City Centre/Vaishali) at Operations Control Centre (OCC) was intermittently getting lost today between Karol Bagh and Dwarka section."
(This story has not been edited by Devdiscourse staff and is auto-generated from a syndicated feed.)