Residents of Mulund and Andheri complain that those placed under quarantine have been seen walking around; cops say in order to book them, BMC will have to report them first.The home quarantine stamp and the threat of police action have not deterred many residents with recent international travel history from stepping out.At Mulund’s Runwal Towers, three students who returned from the UK and the USA on March 17 were placed under home quarantine for 14 days, but despite repeated reminders from the office bearers of the housing society, they have allegedly refused to stay indoors. This forced other residents to seek local MLA Mihir Kotecha’s intervention. Kotecha said he has taken the issue up with the Mulund police and the BMC. He asked that the three residents be booked for endangering others’ lives. “The police and the BMC have warned them. But if they violate home quarantine again, a case must be filed against them.”Runwal Towers’ residents are the only harried lot. Andheri West MLA Ameet Satam said a 40-year-old resident of the area who returned from London on March 16 was seen roaming around in the locality the very next day. Satam said he alerted the BMC and appealed to residents to keep an eye on those who have been placed under quarantine. “There must be zero tolerance to those who violate the quarantine norms. They must be booked and a stern message must be sent out,” he asserted.Earlier his week, Home Minister Anil Deshmukh said that the police have been asked to take action under the Epidemic Diseases Act, 1897, against those who violate the mandatory quarantine period. An official said the police are also empowered to book such people under Section 188 (disobedience to order duly promulgated by a public servant) of the IPC.At a meeting on Thursday, BMC Commissioner Praveen Pardeshi directed officials to share with the police the mobile numbers of people placed under quarantine to allow their movement to be tracked through GPS. “Any non-compliance should be dealt with very strictly by the police department,” he said. Civic officials said they will soon pass on the phone numbers to the police.But so far, no one has been booked. Pranay Ashok, spokesperson of the Mumbai police, said in order to book people, the BMC must first report them.