Siliguri, July 05: The National Highway 31A linking Siliguri with Kalimpong and Sikkim which remained blocked following a landslide was reopened to traffic this afternoon, district magistrate of Darjeeling H Mohon said. Huge rocks rolled down on to the arterial road near Sevoke Kali temple, about 25 km from here, yesterday, isolating Kalimpong subdivision of Darjeeling district and Sikkim from the rest of the country. The landslide, biggest during the monsoon, however, did not cause any casualty or injury, officials said. Bureau Report