SHILLONG : A 72-hour lockdown started in Meghalaya's state capital Shillong from Monday amid rising cases of novel coronavirus in the state, officials said.Around 30 localities, mostly in the worst-hit East Khasi Hills district, have already been declared containment zones, they said.The lockdown in Shillong agglomeration -- localities within the Shillong municipality and scheduled areas -- was announced after 56 new COVID-19 cases were reported in the last two days.Of these, 37 are armed forces personnel, including 23 troopers of the BSF, Health Services Director Aman War said.Meghalaya has 543 active COVID-19 cases, while 173 people have recovered from the disease.