Delhi Chief Minister Arvind Kejriwal on Sunday announced extension of the ongoing lockdown by one more week in the national capital to prevent the spread of Covid-19.

The lockdown imposed on April 19 has been extended for the fourth time till May 24 morning. It was scheduled to end at 5 am tomorrow.

The Covid-19 situation has been improving in Delhi with the number of cases and positivity rate going down steadily in the past few days.

The chief minister said the lockdown is being extended as the gains made so far in combating the coronavirus cannot be lost due to relaxations now.

"We have been witnessing good recovery following the lockdown. Coronavirus cases have been on a decline," ndtv.com quoted Kejriwal as saying.

"We don't want to lose the gain that we have made in the last few days. We are extending the lockdown for one more week. Instead of tomorrow, lockdown is extended till next Monday, 5 am in Delhi," he added.

The national capital recorded 6,430 new Covid-19 cases and 337 fatalities on Saturday while the positivity rate dipped to 11.32 per cent.

The number of active cases decreased to 66,295 on Saturday from 71,794 a day before, as per the bulletin.

The number of people under home isolation dipped to 42,484 from 45,099 on Friday while the number of containment zones mounted to 57,179 from 56,470 a day before, the bulletin said.