11.   But he acknowledged that Pakistani authorities had at various times turned over to US forces suspects crossing the border from Afghanistan.

12.   But in sign of the threat that Pakistani authorities attach to him, he was surrounded by police officers with machine guns, helmets and bulletproof vests.

13.   But Pakistani authorities have detained two retired nuclear scientists because of their alleged links with the Taliban regime.

14.   Daniel Pearl, the Wall Street Journal reporter kidnapped last month in Pakistan by Islamic radicals, was killed by his captors, US and Pakistani authorities said Thursday.

15.   Despite those suspicions, Pakistani authorities were not so willing to focus on Saeed and his group, which has broad support in Pakistan.

16.   Devaud, who indicted three others related to the case in June, also asked Pakistani authorities last month to indict Zardari on similar charges.

17.   Earlier in the day, Pakistani authorities began clearing the way for the American warplanes.

18.   Five weeks later, the Pakistani authorities seized several associates of Yousef in Peshawar in a crackdown on suspected terrorists.

19.   For their part, Pakistani authorities have said they plan to deploy more troops for civil security.

20.   He added that the Pakistani authorities were not certain that the claim was credible but were acting on the assumption that it was.