The two-and-a-half-year-old girl who was gang-raped in a slum area in Punjab’s Ludhiana district underwent an operation at PGIMER here even as her condition continued to remain serious. The doctors said she is responding to treatment.

Meanwhile, the Ludhiana Police said they were working on “every aspect” of the case and were hopeful of arresting the accused soon.

The girl’s father is a labourer and hails from Bihar. He said the girl was picked up from the hutment in the early hours on Tuesday.