New Delhi Apr 21 PTI There was a delay in services on the Blue Line of the Delhi Metro Rail Corporation DMRC on Thursday morning officials saidThe transporter took to Twitter to inform commuters about it but it did not disclose the reason for the delayDelay in services between Dwarka Sector 21 and Noida Electronic CityVaishali Normal service on all other lines the DMRC tweetedThe Blue Line connects Vaishali and Noida with Dwarka PTI NIT IJT