A small notebook that belonged to Chelsea bombing suspect Ahmad Khan Rahami and contained "ideological" musings was recovered by authorities when he was apprehended in Linden, New Jersey on Monday, according to two U.S. officials.
The notebook contained references to killing nonbelievers and mentioned American-born Muslim cleric Anwar al-Awlaki, a leading al Qaeda propagandist who was killed in a U.S. drone strike in Yemen in 2011, the New York Times reported, citing unnamed sources.
Two U.S. officials said Rahami had traveled to Afghanistan and to Quetta, Pakistan. The official, and other U.S. security sources, said Rahami underwent additional security screening upon returning from abroad but passed on every occasion. One of the officials, who specializes in counter-terrorism, said the "secondary" screening included asking Rahami where he had gone and for what purpose.
Rahami's wife left the United States a few days before the bombings, CNN reported, citing a law enforcement source.
Rahami had emailed U.S. Representative Albio Sires of New Jersey, whose congressional district includes Elizabeth, in 2014 from Pakistan, raising concerns about his wife's visa issues, said Mark Gyorfy, a spokesman for the congressman.
Prosecutors in Union County, New Jersey have charged Rahami with five counts of attempted first-degree murder and two second-degree weapons counts. More charges were expected to be brought against Rahami in federal court.
Rahami and two police officers were wounded in the exchange of gunfire before his arrest.
He was listed in critical but stable condition, and police had not yet been able to interview him in depth, New York Police Department Commissioner James O'Neill said.
Rahami is also suspected of planting a bomb that exploded in Seaside Park, New Jersey on Saturday and up to six more devices found near the Elizabeth train station on Sunday night.
All 29 people injured in Saturday night's blast in Manhattan have been released from hospitals.