"Due to overhead electrification problem between Shadipur and Patel Nagar down line (going towards Noida) at 1:30 PM, trains are being run on single line between Karol Bagh and Kirti Nagar section," a DMRC spokesperson said.
The services were delayed by 8-10 minutes on entire line 3/4 until they were restored at 3.12 PM, he said.