A signalling problem struck the busy Noida Line causing as long as a 30-minute delay in the trains. However, train services did not stop completely.
Delhi Metro runs on an automatic signalling system, which is replaced by a manually operated mechanism when a technical fault is detected.
On the manual signalling system, the speed is restricted, which led to severe delays and inconvenience to the people.
Quoting metro officials, reports suggest that the problem was detected at around 9 am. Following the detection of the snag, the trains' speed was restricted.
“Efforts are on to rectify the problem as soon as possible. Till then, trains will be run at a restricted speed," a DMRC spokesman said.