RAWALPINDI, Dec 18: The army team investigating the blast incident in which President Musharraf’s convoy narrowly escaped, has taken into custody all the law enforcement agencies’ officials who had been on the VVIP route duty on that occasion for questioning, a security source said on Thursday.

All police officials, who had been deployed on the president’s route, Special Branch officials, traffic police staff and intelligence sleuths are being questioned by the investigating team.

The source said the number of security officials, including the police personnel, still being questioned is more than 50.

“Some of the police and security branch officials have been directed to appear before the probe team early morning and are later permitted to leave at night,” the source revealed.

Nothing special has so far emerged from investigation, which could lead the probe team to trace the clue to the terrorists.

The source said that five high explosives were detonated seconds after President Musharraf’s car crossed the Leh bridge.

Action against the officials who had been looking after the security arrangements is likely to be taken after the investigation into the blast is complete, the source said.

He said besides other people, statements of the Special Branch officials and some officers of the police department had also been recorded by the army team.

The source said bomb disposal experts are still trying to determine the “explosive” used in Sunday’s bomb blast.

According to security sources, the bridges located on the VVIP routes are always considered highly sensitive and they are strictly guarded.

In a related move the IGP, Punjab, Masood Shah, and the DIG, Rawalpindi, Israr Ahmed, held a meeting with the senior military officials at 10-corps Headquarters on Thursday and reviewed the security arrangements and progress made in the bomb blast case.

Meanwhile, in another move lights have been installed under the bridges in Rawalpindi and Islamabad. While police patrolling have also been intensified around the bridges.