According to the Karachi Police the incident took place in the Akhtar Colony, area of Karachi on Thursday morning.
During the firing he was injured and lost the battle of his life before reaching the hospital.
This is the second incident of this nature, before this SHO Preedy Police Station, Asadullah, was also killed by the target killers on August 13, 2014.
He received four bullets in different parts of the body, Dr Semi Jamali confirmed while talking about the incident.
According to the Police Officer, Khawaja was going to his office while the target killer attacked him on the Korangi Road, Akhtar Colony.
No arrest has been made yet and police is investigating the matter.
Do you have information you wish to share with PakistanTribeCom? Email our News Desk to share news tips, reports and general feedback. You can also email the Blog Desk if you have an opinion or narrative to share. Follow PakistanTribe on Twitter Follow @PakistanTribe and Join us on Facebook