"We have arrested one suspect [in connection to Zahra Shahid's murder], while there are others who will soon be arrested," Karachi police chief Ghulam Qadir Thebo told reporters at a press conference Thursday evening.

“This was not a robbery; this was an incident of targeted killing,” Thebo told reporters.

“We are carrying out further investigation and interrogation, and will share facts as they are further revealed. We are not able to share further information at this stage,” he said.

“The suspect originally belongs to Hyderabad but lives in Karachi” in the DHA area, he said.

Police further claimed having uncovered clues leading to the possible arrest of further suspects.

Thebo declined to give any further information into the arrest or investigation.

Police sources had earlier told Dawn.com that up to three men have been arrested in connection to the PTI leaders murder.

The sources claimed the arrested men, said to be affiliated to a political party, have admitted to the murder of the PTI leader during interrogation.

Also read: Murder of PTI leader was targeted killing: police

Police had earlier already declared Ms Husain’s murder to be an act of targeted killing, ruling out the possibility that the PTI leader was killed while resisting a mugging attempt at her Defence house.

The PTI leader was gunned down in Defence Phase-IV on May 19, 2013.

Before choosing her political career, Ms Husain was associated with Karachi University’s international department as its faculty member. She taught there until the 1980s.