QUETTA, Sept 25: Police have detained 15 suspects in connection with Wednesday’s suicide attack on an FC vehicle in Quetta.

“The case has been transferred to the CID for investigation,” city police chief Mohammad Akbar told Dawn on Thursday.

No organisation or person has claimed responsibility of the attack. “The bomber has not been identified so far,” police sources said, adding that his head had been taken to the Civil Hospital.

Security was put on high alert in the city and hundreds of additional police personnel were deployed outside government and private buildings, hotels, railway station, airport and other places.

Strict checks were carried out at the Quetta airport after a threat of a suicide attack on the airport in Islamabad.

Meanwhile, sources said that most of the suspects arrested were Afghans.

A CID official said the man who had blown himself up near the FC vehicle appeared to be an Afghan national. Samples of his blood and parts of his body will be sent to Lahore for a DNA test.

CID SSP Ghulam Dastagir said the department was also investigating the recent bomb blast in a seminary near Kuchlak. “Teams of police are questioning students and teachers of the madressah,” he said, adding that none of them had been formally arrested.

Sources said police had exhumed the body of a victim of the blast and obtained samples for a DNA test.

Police were also looking for some injured students who had disappeared from a hospital.