New Delhi [India], December 31 (ANI): As many as 23 trains are running late in Delhi due to dense fog resulting in low visibility in the region, Railway officials said on Sunday. According to Indian Railways, Puri-New Delhi Purushottam Express is delayed by almost 7 hours while Howrah-New Delhi Poorva Express and Azamgarh-Delhi Kaifiyat Express are delayed by 5 hours. About five trains are delayed by 4 hours including Saharsa-New Delhi Vaishali Express, Allahabad-New Delhi Prayagraj Express and Rajendranagar-New Delhi Sampoorn Kranti. The Sealdah-New Delhi Rajdhani is running late by 1.45 hour…