US President Donald Trump on Wednesday thanked India and Prime Minister Narendra Modi for allowing the export of hydroxychloroquine (HCQ) - an anti-malarial drug being experimentally used in many countries for treating Covid-19 - to the US.

Donald Trump said in a tweet, "Extraordinary times require even closer cooperation between friends. Thank you India and the Indian people for the decision on HCQ. Will not be forgotten! Thank you Prime Minister @NarendraModi for your strong leadership in helping not just India, but humanity, in this fight!"

Extraordinary times require even closer cooperation between friends. Thank you India and the Indian people for the decision on HCQ. Will not be forgotten! Thank you Prime Minister @NarendraModi for your strong leadership in helping not just India, but humanity, in this fight! Donald J. Trump (@realDonaldTrump) April 8, 2020

India has partially lifted a ban on export of hydroxychloroquine and is supplying the drug to the US and several other countries hit by the coronavirus pandemic.

President Donald Trump had earlier warned India that the US may retaliate if it did not export anti-malarial drug hydroxychloroquine despite his personal request, saying he would be surprised in case of a negative outcome as New Delhi has good relations with Washington.

Hydroxychloroquine, an old and inexpensive drug used to treat malaria, is seen as a viable therapeutic solution by President Trump to coronavirus that has so far killed more than 10,000 Americans and infected over 3.6 lakh within weeks.