Maharashtra has imposed a night curfew - 11 PM to 6 AM till January 5 - for Mumbai and all municipal corporation areas, in view of the mutated strain of coronavirus that has emerged in the United Kingdom and caused several nations, including India, to temporarily ban flights to and from that country. Passengers from European countries other than the UK, or any in the Middle East, will be sent to 14-day institutional quarantine, and others must adhere to a similar period of home quarantine, the state government said late Monday evening, after Chief Minister Uddhav Thackeray held a meeting to discuss the mutant virus strain.