FILE PHOTO: Police officers advise women to maintain distance as they wait to collect grocery items during an extended nationwide lockdown to slow the spreading of COVID-19, in Ahmedabad, on Apr 16, 2020. (Photo: REUTERS/Amit Dave)

MUMBAI: Hundreds of Indian police have tested positive for the coronavirus in recent days, raising alarm among an over-stretched force as it attempts to enforce the world's largest lockdown.