The incident took place this afternoon at a wing of a building situated in police colony at Maratrao Kannavamvar Nagar in Vikhroli, Deputy Commissioner of Police (Detection) Dhananjay Kulkarni said.
Vinod Nandgaonkar, presently on deputation with National Investigation Agency, his wife and son sustained injuries, Kulkarni said.
The victims are admitted at the Mahatma Phule hospital and their condition is out of danger, police said.