LAHORE - No important arrest has been made so far in connection with the rape and murder case of seven-year-old girl Zainab as police widened the scope of investigation to hunt down a serial killer.

A police official on Sunday told The Nation that the Joint Investigation Team was working on different lines to solve the latest child rape and murder case that sparked countrywide protest this month.

“Some suspects are being interrogated in connection with a series of child rape and murder cases. But no important arrest has been made yet in the case of Zainab,” the official said, requesting anonymity.

The resident of Road Kot, Zainab Amin was abducted on Jan 4 when she was going to her aunt’s house nearby for Holy Quran lessons. She was found murdered after being raped on a heap of garbage in the same locality on Jan 9.

On the other hand, Punjab Police Inspector General Arif Nawaz Khan on Sunday came down hard on the police investigators and expressed anger over non-arrest arrest of the killer.

heikhupura Regional Police Officer and Kasur District Police Officer were also present on this occasion.

“The delay (in identification and arrest of the killer in Zainab case) has put a question mark on the performance of the investigation police,” a police spokesman quoted the IGP as telling the senior officers.

The IGP while presiding over a meeting at Kasur police headquarters on Sunday ordered the police to speed up the process of investigation.

The police chief also expressed dissatisfaction over the performance of the police investigators including the SPs, DSPs, and SHOs concerned.

On the occasion, the IGP said that the Zainab murder case has become a “big challenge” for the police and the police must focus on the traditional methods of investigation rather than totally relying on scientific techniques. Meanwhile, the provincial police chief directed the members of the joint investigation to step up their efforts to solve the Zainab murder case at the earliest.

Earlier, police arrested two suspects in connection with the Zainab murder case and termed it an important development in the search of suspect involved in the serial killings.

Some media reports suggested that two more suspects were taken into custody by the joint investigation team. Reportedly, the suspects were arrested on the identification of Umar Farooq, who was arrested last week from a house near Bhatta Chowk by Lahore police. He was handed over to the JIT for further investigations.