A fire broke out at a residential building in Mumbai's Lalbaug area in the wee hours of Tuesday leaving four persons, including two children, with burn injuries.

As per the information received from the MFB, the blaze occurred at around 5.10am in a room on the third floor of the Meghwadi Building on SS Road after an explosion due to a leak from a gas cylinder. The fire was doused within 30 minutes by 5.30am