U.S. Embassy officials met Thursday with an American construction worker detained in Pakistan while on a solo mission to kill Osama bin Laden.

Gary Brooks Faulkner claims he set off for Pakistan after God appeared to him in a dream and ordered him to kill al-Qaeda's leader to avenge the Sept. 11, 2001, attacks in the U.S., according to Pakistani security officials.

Police detained Faulkner on Sunday in a forest in northern Pakistan. They said he was carrying several weapons, including a pistol and a sword, as well as night-vision equipment. He was trying to cross the border into the Afghan region of Nuristan, one of bin Laden's rumoured hiding places, they said.

Catching the al-Qaeda chief was 50-year-old Faulkner's passion, his brother Scott Faulkner has said. He sold all his tools to finance his trip and was prepared to die in Pakistan, his brother added.

Faulkner's sister, Deanna Faulkner, has expressed concern about his health, saying he suffers from a serious kidney disease and can't survive without dialysis.

U.S. officials were able to see Faulkner in Islamabad on Thursday, said embassy spokesman Richard Snelsire. He declined to provide details about his condition or potential release, citing privacy concerns.

Faulkner has not so far been charged with any crime in Pakistan.