A probe into a scandal threatening Pakistan's president appears at risk of collapsing after a panel of judges ruled out traveling abroad to hear testimony from the key witness.
American businessman Mansoor Ijaz implicated President Asif Ali Zardari in a May memo that sought U.S. help to rein in Pakistan's powerful military.
But Ijaz, citing fears for his safety, refuses to travel to Pakistan to be interviewed by investigators.
His testimony is considered key to the case against Zardari, who faces speculation that he could be forced from office over the scandal.
Investigators have adjourned until February 9, saying they will ask the Supreme Court to extend their mandate, which is due to expire on January 28.
The Supreme Court ordered the investigation on the advice of Pakistan's intelligence agency chief.
compiled from agency reports