Tamil Nadu Chief Minister M K Stalin on Saturday requested the Centre to enhance the medical oxygen allocation to the state to 500 metric tonnes. <br /> <br />The chief minister, who had a telephonic conversation with Prime Minister Narendra Modi, assured the PM that Tamil Nadu would stand by the Centre in the fight against coronavirus. <br /> <br />The prime minister asked the Tamil Nadu government to continue testing for the virus on a massive scale and focus on monitoring the mild coronavirus patients at home.