News agency ANI has reported that Habitan Bashir Baloch, husband of Karachi University suicide bomber Shari Baloch, has allegedly been arrested by security personnel on Wednesday, a day after the explosion. The news organisation cited Pakistan’s ARY News. Habitan is being interrogated by authorities.

According to the ARY News report, this is the first arrest in the case.

Also read: Your selfless act has left me speechless: Karachi suicide bomber’s husband

It also stated that China’s ambassador to Pakistan had been informed about Habitan’s arrest.

In a briefing chaired by Pakistan’s interior minister, Rana Sanaullah, the ambassador was also apprised about the latest developments in the case.

Also read: Who was Shari Baloch, the Karachi University blast suicide bomber?

Sanaullah said in a statement that the Pakistan government had assured the Chinese embassy of full cooperation in the investigation of the blast.

As many as four people, including three Chinese nationals, were killed in a car explosion inside the premises of the Karachi University on Tuesday. The blast occurred in a van near Confucius Institute, a Chinese language teaching centre at the University.

Also read: Tick, tick, boom: Watch moment of Karachi University blast captured on CCTV

The attack was carried out by suicide bomber Shari Baloch. Investigators also found an association of some relatives of Baloch with the Baloch Students Organisation (BSO), a banned outfit.

The Balochistan Liberation Army (BLA), has claimed responsibility for the blast. The BLA has previously threatened to launch attacks on Chinese companies and people in Pakistan, the ARY News report added.

Also read: Karachi blast: Balochistan Liberation Army claims 1st woman suicide bomber

Meanwhile, China has asked Pakistan to scale-up security for its citizens and also demanded a thorough investigation of Tuesday’s blast. The blood of the Chinese cannot be shed in vain, and those behind this incident will surely pay the price, a Chinese foreign ministry spokesperson said, news agency PTI reported.