Pakistan has called on the US to share information about new al-Qaeda leader Ayman al-Zawahri after US Defence Secretary Leon Panetta said he believed that Osama bin Laden's successor was in Pakistan. During his first trip to Kabul on Saturday as Pentagon chief, Panetta said he believed that the new al-Qaeda leader was living in Pakistan's lawless tribal belt on the Afghan border.

Pakistan has called on the US to share information about new al-Qaeda leader Ayman al-Zawahri after US Defence Secretary Leon Panetta said he believed that Osama bin Laden's successor was in Pakistan. During his first trip to Kabul on Saturday as Pentagon chief, Panetta said he believed that the new al-Qaeda leader was living in Pakistan's lawless tribal belt on the Afghan border.

The Pakistani military said it was carrying out "intense operations" against al-Qaeda and its affiliates as well as "terrorists leadership" and people who posed a threat to the country's security.

A packed passenger train travelling at …