Patiala: The Punjab Pollution Control Board (PPCB) has sealed a paper mill for violating pollution control norms. The power connection of the mill has also been disconnected. Highly placed sources said on specific information a PPCB team conducted a raid at the DSG Paper Mills Private Limited, located on the Main Road, Patiala, some 10 days ago. “In view of the violations, the mill was sealed a couple of days back,” said the board authorities.