The tally of coronavirus casescrossed the 3,000-mark in Mumbai on Monday after 155 more people tested positive, while the death toll rose to 138 with the virus killing seven more patients here, the city civic body said.According to a BMC (Brihanmumbai Municipal Corporation) release, the number of COVID-19 cases now stood at 3,090.The spurt in cases has raised concerns among authorities about the pace of the coronavirus spread as 1,000 new cases were added in just four days.The BMC said 84 more patients have recovered from the disease and discharged from hospitals, taking the number of cured cases to 394.