ISLAMABAD, Feb 18: Television, radio and newspaper advertisements run by the United States in Pakistan asking for leads to Osama bin Laden and other Al Qaeda kingpins have yielded useful information, a US official said on Friday.

The brief television spots flash up colour pictures of Osama and his 13 most wanted henchmen while a voice-over in Urdu offers rewards of up to $25 million. "During the last couple of days we got some 28 calls and a number of them gave useful information," US embassy spokesman Greggory Crouch told AFP.

The first advertisement on Radio Pakistan was aired on Wednesday while the television campaign started two weeks ago, Mr Crouch said. The first newspaper advertisement ran on Jan 7. -AFP