A masked man and threw acid on four girls in Sialkot on Tuesday, Express News reported.
The assailant entered the house of the victims and then committed the crime in the Pakka Garha area.
The girls suffered severe burn wounds in the process.
The victims have been identified as Afshaan, 20, Amna, 8, Ayesha, 7, and Jannat, 6.
They were shifted to the Civil Hospital, where Afshan is said to be in a critical condition with her face being severely burnt.
Authorities have not managed to catch the supposed culprit behind and are yet to ascertain the motive behind the attack.