"Power supply to DMRC was not available from Delhi Transco due to which Subhash Nagar, Dwarka, Chhatarpur, and Airport RSS (Receiving Sub-Stations) did not supply power to Line 2, 3 and 4," a senior DMRC official said.
"Trains were run at a lesser frequency by drawing power from other sources," he said.
The technical snag occured at around 12:25 PM and by 1:15-1:30 PM, slowly the power was restored and normal operations were resumed, he said.
"Four round trips of trains were cancelled on Line 2 and 15 on Line 3," DMRC said.