Fire incidents were reported in two city-based hotels, including the luxury hotel Trident, late Wednesday night, officials said.
No casualties have been reported in the incidents, they said.
The blaze was confined to a shop in the shopping centre, spread in an area of 2,000 sq ft, and it was doused by 1 am, he said.
In another incident, a blaze erupted at the Afzal Hotel located near Mazgaon Circle in south Mumbai, another official said.
The fire brigade got a call about the blaze around 11.37 pm. Fire tenders were rushed to the spot and the flames were extinguished by 1.15 am, he said.
Some electric wiring, chimney and items in the hotel's kitchen were damaged in the fire, he said, adding that the cause of the blaze will be ascertained after an inquiry.
The two incidents come days after a fire at the government-run ESIC Kamgar Hospital at Marol in suburban Andheri on Monday in which nine people were killed and nearly 175 others injured.