The Delhi Police has registered more than 600 cases and arrested over 300 people in connection with Covid-related crimes, officials said on Saturday. According to the data shared by police, 109 cases of alleged hoarding and black-marketing of oxygen cylinders and coronavirus drugs were registered between April 13 and May 18. While 492 cases of alleged cheating of people on the pretext of providing them Covid-related help were lodged during the same period, police said. A total of 312 people have been apprehended, they said, adding most of the arrests were made outside the national capital. Police have blocked around 300 bank accounts and more than 900 phone numbers. The cheated amount recovered during this period would be in crores, they said.