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NYC mayor: 'Lone wolf' arrested in bomb plot

Louis Lanzano / AP

This police photo shown at a news conference in New York, Nov. 20, shows who authorities say is Jose Pimentel making a bomb. Mayor Michael Bloomberg said Pimentel, of Manhattan, a 27-year-old U.S. citizen originally from the Dominican Republic, was arrested Saturday for allegedly plotting to bomb police and post offices in New York City as well as U.S. troops returning home.

According to msnbc.com staff and news service reports:

Police Commissioner Raymond Kelly said police had to move quickly to arrest Pimentel on Saturday because he was ready to carry out his plan.

"We had to act quickly yesterday because he was in fact putting this bomb together. He was drilling holes and it would have been not appropriate for us to let him walk out the door with that bomb," Kelly said.

The police commissioner said Pimentel was energized and motivated to carry out his plan by the Sept. 30 killing of al-Qaida's U.S.-born cleric Anwar al-Awlaki.

"He decided to build the bomb August of this year, but clearly he jacked up his speed after the elimination of al-Awlaki," Kelly said.

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Jefferson Siegel / Pool via AP

Jose Pimentel, 27, right, represented by attorney Joseph Zablocki, left, is arraigned at Manhattan criminal court, Nov. 20, in New York. Pimentel, 27, an "al-Qaida sympathizer" accused of plotting to bomb police and post offices in New York City as well as U.S. troops returning home, was charged with criminal possession of explosive devices with the intent to use in a terrorist manner.