Islamabad, Pakistan ? The United States and its allies have moved closer to capturing Osama bin Laden in the past two months, a top U.S. counterterrorism official said in a television interview aired Saturday.

“If he has a watch, he should be looking at it because the clock is ticking. He will be caught,” Joseph Cofer Black, the U.S. State Department coordinator for counterterrorism, told private Geo television network.

Asked if concrete progress had been made during the last two months — when Pakistan has arrested dozens of terror suspects including some key al-Qaida operatives — Black said, “Yes, I would say this.”

Black, who briefed a group of Pakistani journalists after talks with officials here Friday, said he could not predict exactly when bin Laden and other top al-Qaida fugitives would be nabbed.

“What I tell people, I would be surprised but not necessarily shocked if we wake up tomorrow and he’s been caught along with all his lieutenants. That can happen because of the programs and infrastructure in place,” he told Geo.

Bin Laden and his top associate Ayman al-Zawahri are believed to be hiding somewhere along the long border between Pakistan and Afghanistan. Officials have divulged no solid intelligence on their whereabouts, and it’s not clear if they have any.

Pakistan is a key ally of the United States in its war on terror, and Black’s visit comes weeks after Pakistani security forces captured Ahmed Khalfan Ghailani, a Tanzanian wanted for the 1998 U.S. embassy bombings in east Africa, and Mohammed Naeem Noor Khan, a Pakistani computer expert allegedly linked to al-Qaida operatives around the world.

The arrests led to a terror warning in the United States, and arrests in Britain and the United Arab Emirates.

Black attended a meeting of the Pakistan-U.S. Joint Working Group on Counterterrorism and Law Enforcement on Thursday and Friday.

During the talks, Pakistan asked U.S. officials for more helicopters, surveillance and communications equipment to help Pakistani forces guard border areas near Afghanistan “more efficiently,” a Pakistani official said.