A woman, in her 30s, was shot at by two unidentified bike-borne men after she resisted their attempt to snatch her chain, in north Rohini.
The incident occurred on Saturday when Priyanka Goyal, a resident of Avantika in Rohini, had gone to Sector 6 market.
While she was walking on the road near Vishram Chowk, the bike-borne men came from behind and one of them tried to snatch her gold chain, the police said.
She caught hold of one of them and sought help from a passersby but no one came to help her since the accused was carrying a firearm, they said.
After firing at her, the miscreant pushed her down and fled from the spot, the police said.
Goyal followed him and managed to catch hold of the collar of the pillion-rider. He hit her with the pistol and threatened to fire at her, the police said.
He shot her in the leg and the duo fled from there with the chain. The police were informed and she was taken to a hospital where her condition is critical, they added.
The accused were not wearing helmets, the police said, adding, they are scanning the CCTV footage from the area to identify them.