As authorities search for clues to Ahmad Kahn Rahami’s motives and associations, attention has turned to handwritten writings analyzed following his arrest Monday that refer to Islamic terror. 

In one passage, originally reported to be found near the pressure cooker bomb in New York City, included references to Boston terrorists Dzhokhar and Tamerlan Tszarnev, who set off homemade bombs at the Boston Marathon in April 2013, CNN reported.

The notebook, which had a yet-unexplained bullet hole in it, is said to contain ramblings about terrorist masterminds, specifically Anwar al-Awlaki, the Yemeni-American imam who was a spokesman for al Qaeda, authorities said. 

Rahami, 28, was arrested on Monday following an intense manhunt and gun shootout in Linden, New Jersey. According to authorities, Rahami has not been cooperating with the police.

Despite Rahami's references to the terrorists, it is not yet clear if he was directly affiliated with a terror group or had any accomplices to his acts.

"This has the flavor of someone who was self-radicalized and perhaps who was inspired but not instructed," homeland security adviser Michael Balboni told CNN. 

Afghanistan-born Rahami is said to have traveled to Afghanistan and Pakistan multiple times in the last few years where he could have been radicalized. He also married an Afghani woman who is said to have fled the United States a few days before the recent attacks.