NEW DELHI: Chief Minister Arvind Kejriwal on Sunday announced extension of the ongoing lockdown in Delhi by another week, saying the process of unlock will start from May 31 in a phased manner if the number of COVID-19 cases continue to decline.

Kejriwal said the top priority of his government is to vaccinate people of the city at the earliest to prevent the third wave, and added that he was in talks with vaccine companies for required doses and is ready to buy vaccines at any cost.

Vaccination of people aged 18-44 years has been stopped in Delhi on Sunday as the city has run out of stocks.

In the past 24 hours, Delhi recorded around 1600 positive cases and the positivity rate went further down to below 2.5 percent, the chief minister said in an online briefing.

"I consulted many people and the general opinion favoured lockdown extension for one week. So, Delhi government has decided that lockdown will be extended to 5 am on May 31," he said.

Kejriwal said if the lockdown is lifted now the gains made in the last one month through a lot of struggles, hard work and sacrifice may be lost.

"If the current downward trend in number of cases sustains in next one week and people follow precautions against COVID with strict discipline as they have done so far, we will start the process of unlock from May 31," he said.

It will not be correct to unlock in one go. The unlock process will happen gradually by allowing certain activities from May 31, he stated.

The Delhi government has made arrangements to vaccinate all people in Delhi within three months but there is shortage of vaccines in the country, the chief minister said.

It is being said that a third wave of COVID-19 will arrive. If everyone get vaccine, perhaps the third wave may not arrive, he said.

"We are preparing to vaccinate everyone at the earliest. We are talking to the Centre and the vaccine companies. I am myself talking to vaccine companies, foreign and Indian ones, about how to vaccinate maximum people. We are ready to spend any amount of budget to get the vaccines for Delhi people," he said.