At least four persons, including a minor boy, were killed and two others injured in different incidents as monsoon made a grand entry in Mumbai and surroundings on Friday, hitting normal life with the usual woes of water-logging in many areas, delays in flights, road, and train traffic.

In the Goregaon suburb of north-west Mumbai, four persons of a family including a minor girl suffered electrocution from some live wires in the vicinity of their home in which two perished and two were injured.