"Metro services of Line 3 (Dwarka-Noida City Centre) and Line 4 (from Yamuna Bank to Vaishali) are running slowly, following a technical problem in the overhead electrification, which transmits energy to trains, on the Dwarka stretch at Shadipur and Patel Nagar," said a Delhi Metro official.
The crowds were menacingly thick at Rajiv Chowk, the busiest Delhi Metro interchange station through which the Blue Line passes. Trains also stopped for 5-10 minutes on the route on several occasions, said Devansh, a student travelling from Rajiv Chowk to Noida.
"It took me one hour from 1:30 pm to reach Noida sector 16, a distance which normally takes just 30 minutes," he said.
Normally, a train plies every three minutes between Dwarka and Yamuna Bank. From there every alternate train goes to Vaishali and Noida City Centre.
A metro official said regular announcements were made at all the stations and in trains about the delay due to the technical problem.
The 49-km Blue line that covers 43 stations in some of the most populous parts of the capital, is the longest Delhi metro route.