In the Pakistani city of Karachi, police have sealed a number of high-risk neighbourhoods by blocking all entry and exit points with shipping containers, in a bid to freeze any movement.

Chief Minister Syed Murad Ali Shah confirmed that his government has sealed the areas that are worst-affected in the city. "We are arranging to increase testing points in these areas," he said.

But crowds in the city's vast slums, as well as other districts, continue to disregard calls for social distancing by crowding in public spaces such as markets.

Similar scenes have been observed in other major cities in the country such as Lahore and Multan.

Pakistan has reported more than 5,000 infections and at least 90 people have died from the virus.