ISLAMABAD -- Pakistani police have booked three accused including a rangers inspector "Wasim Akhtar" of assassination attempt on President Pervez Musharraf, officials said Tuesday.

Police after registering a case at airport police station sealed the rangers inspector. Two other accused Mohammed Imran and Mohammed Hanif of "Harkat-ul-Mujahideen al-Alami" were arrested on Sunday last.

The accused had attempted to assassinate President Pervez Musharraf on April 26, but their remote control device failed to activate explosives hidden in a car parked on the Shahrah-e-Faisal in Karachi, IRNA reported.

"Wasim Akhtar, appeared in court in the southern port city on Tuesday, rangers chief Major-General Salahuddin said in port city of Karachi.

Two of his alleged accomplices are due in court.

They are also charged in connection with two recent deadly bombings against foreign targets in the city.

Police have launched a massive hunt for the arrest of other accused involved in the U.S. Consulate blast and other major terrorist activities.

Inspector Akhtar is said to have helped by providing details of the president's itinerary when he visited the city for campaign before the April referendum which extended his term in office.

News of the attempt on the president's life only emerged on Monday after the suspects apparently confessed to police.

Police say the group used a Suzuki pickup in the failed bid - the same car later used in a bomb blast outside the U.S. Consulate.

That attack, on 14 June, killed 12 Pakistanis. A bomb on May 8 near the Karachi Sheraton Hotel killed 14 people, 11 of them French engineers.