Islamabad ? Pakistan’s Taliban chief claimed responsibility Tuesday for a deadly assault on a police academy, saying he wanted to retaliate for U.S. missile attacks on the militant bases on the border with Afghanistan.

Baitullah Mehsud, who has a $5 million bounty on his head from the United States, also vowed to “amaze everyone in the world” with an attack on Washington or even the White House.

The FBI, however, said he had made similar threats previously and there was no indication of anything imminent.

Mehsud, who gave a flurry of media interviews Tuesday, has no record of actually striking targets abroad although he is suspected of being behind a 10-man cell arrested in Barcelona in January 2008 for plotting suicide attacks in Spain.

Pakistan’s former government and the CIA consider him the prime suspect behind the December 2007 killing of former Prime Minister Benazir Bhutto.