Metro

O to hail ‘terror’ busters

President Obama will visit FBI headquarters in the Big Apple tomorrow to personally thank agents involved in the arrest of a Denver man who allegedly planned to bomb the city’s subways, law-enforcement sources said.

Obama will journey to 26 Federal Plaza near City Hall to thank both the G-men and members of the FBI-NYPD joint terrorism task force for their work in the arrest of airport-shuttle driver Najibullah Zazi, 24, the sources told The Post.

Zazi, an Afghan immigrant who used to live in Queens and ran a coffee cart in the Financial District, has been indicted by a Manhattan federal grand jury on a charge of conspiracy to use weapons of mass destruction.

Prosecutors allege that Zazi learned to make explosives at an al Qaeda training camp in Pakistan, had bomb-making notes on his laptop and bought materials to pull off his deadly plot, which was to have been similar to the 2005 London subway massacre.

Surveillance videos showed him purchasing acetone and hydrogen peroxide at beauty-supply stores.

Authorities speculate that the homemade bombs would have been hidden in nine identical backpacks seized from a Queens home that Zazi had visited shortly before Sept. 11, 2009.

The FBI, which had Zazi under surveillance, also has been watching several other suspects who may have helped Zazi acquire the materials and discussed how to make a bomb with him.

Federal officials have called the alleged plot one of the most serious terrorism threats crafted on US soil since 9/11.

“The conspiracy here is international in scope,” Assistant US Attorney Jeffrey Knox, the lead prosecutor in the case, has said.

Zazi, who is being held without bond in New York, has denied receiving al Qaeda training or visiting one of the group’s training camps. He said went to Pakistan to see his wife, who lives in Peshawar.

andy.geller@nypost.com