KARACHI, 28 November — Police, in a pre-dawn swoop, arrested over two dozen Taleban and their supporters in Karachi yesterday who were subsequently sent to Islamabad for questioning by a joint team of Pakistani and American experts. Among those arrested were members of the Al-Qaeda network.

Officials, reluctant to give details, however confirmed that police and the Military Intelligence have been maintaining a round-the-clock vigil on Taleban activists and supporters in Pakistan.

They had seized some documents during the raid on Soldier Bazar office of the Taleban last week, which has now been sealed off. Authorities were able to get clues from those papers about persons financing the activities of the Taleban and the Al-Qaeda network in Karachi. They included traders and important people from other walks of life. A total of 25 of the detainees have been flown to Islamabad for interrogation by authorities. Police and security agencies are also keeping a watch on people who may try to foment trouble in retaliation for the sealing of the Taleban office.

Meanwhile, officials said 15 Afghans detained at a Taleban office in southern Karachi on Saturday shortly before it was sealed by police may have terrorist connections. "The 15 Afghans have been detained ... for suspected links with terrorists," Home Secretary Brig. Mukhtar Sheikh told AFP, without elaborating.

None of the detainees has so far been charged as the investigation is still in progress, he said.

"It could be possible that all of them may not be involved in terrorist or criminal activities," he said, adding that those found to be involved would be charged. Sources close to intelligence agencies said the authorities are investigating possible links between some of the detained Afghans and alleged terrorist leader Osama Bin Laden and his Al-Qaeda organization. "It is too early to say anything at this stage as the probe has not been completed yet," one source said.

The 15 were rounded up at the Taleban office in the Soldier Bazar district, which had been run under the supervision of Afghan Consul General Rehmatullah Kakazada. Among those arrested was the head of the office, Abdur Rehman Haleem.

Police guards have since been deployed outside the office and its main gate locked.

However, another Taleban office in the same district has not been affected and was functioning normally.