The girl, who was on Monday shot at by his ‘boyfriend’ at Lovely Autos showroom over an argument, on Tuesday slipped into a coma.
The incident was reported around 2.30 pm, when the woman who works at the billing counter of the showroom was having lunch during the break.
After firing bullets on her, the accused identified as Manpreet (27) also shot himself. The woman was immediately rushed to a private hospital.
Commissioner of Police Gurpreet Singh Bhullar said after firing two bullets on self, Manpreet died on the spot.
A suicide note was also recovered from his pocket, in which he took the responsibility of killing himself and the woman.