KARACHI, June 13: Security personnel, investigating into the deadly attack on Karachi corps commander, said on Sunday they had made headway with the detention of seven members of a militant group.

Intelligence sources said the alleged members of the Harkatul Mujahideen al-Alaami were under intense questioning over Thursday's assault on the convoy of Lt Gen Ahsan Saleem Hayat.

"Seven Al-Alaami men have been picked up from different areas of Karachi in raids," a security official told AFP, on condition of anonymity. In the last three days, police and intelligence agencies detained around 50 people, but most of them had now been freed after questioning, he added.

Sindh IG Syed Kamal Shah said "positive" headway had been made and the situation would be clear in the next few days. "We have certainly found a lead and some people have been detained, but I cannot share the details with you at this stage," he said, adding, "We will give you the good news soon."

Investigators strongly suspect the wanted militant, Amjad Farooqi's hand in the attack.