The Brihanmumbai MunicipalCorporation on Saturday sanitsed 23 arterial roads in different parts of the city, during the 21-day COVID-19 lockdown.Maharashtra has recorded 160 cases of coronavirus, of which Mumbai has the highest number of patients at 63.The civic body sanitised Seven Hills Hospital, which is being used as a quarantine facility, an official said.Vehicles parked at the hospital and baggage of all international travellers, who are quarantined there, were also sanitised, he said.Similarly 362 ambulances, used to transport COVID-19 patients, were sanitised at state-run Kasturba Hospital, which has been treating positive patients since the outbreak.The civic body also sanitised 23 arterial roads in different parts of the city, he added.