“Due to high grade fever and a sudden drop of my oxygen levels last night I have been admitted to RGSSH (Rajiv Gandhi Super Speciality Hospital). Will keep everyone updated,” Delhi’s health minister Satyendar Jain said in a tweet.

Several senior officials from finance, foreign affairs and law departments that are all based in Delhi have tested positive over the past few weeks. Most have been working in offices from the beginning of the crisis.

Jain himself attended a meeting on Sunday where Home Minister Amit Shah and Delhi Chief Minister Arvind Kejriwal were present. It was not immediately known if Shah, seen as the most powerful member of the cabinet after Modi, was going to test.

Kejriwal had tested negative earlier in the month.