"The victim, a resident of Pashchim Vihar area, told us that when she had gone to Punjabi Bagh area for some work, four bike-borne youth threw acid on her. The incident took place at around 7 PM yesterday. She has sustained burn injuries on her right arm and back in the attack," a senior police officer said.
The woman has been admitted to Sanjay Gandhi hospital.
The attackers are known to the victim. They have been identified as Sonu, Monu, Johny and Sanath. Efforts are on to nab them, police said.