MUMBAI, India — Masked Indian commandos dropped from helicopters Friday onto the roof of a Jewish center in Mumbai where Muslim militants were holed up, possibly with hostages, as sharpshooters kept up a steady stream of fire at the five-story building.

The assault was punctuated by gunshots and explosions from within the building as the forces cleared the building floor-by floor. Elsewhere in the city, commandos scoured two luxury hotels for suspected Muslim attackers still holed up more than a day after a chain of attacks across India’s financial center by the militants left at least 119 people dead.