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			 Police are working with the Federal Bureau of Investigation to 
			verify the credibility of the tip related to the ambush shooting on 
			Thursday, which led to charges of attempted murder, assault and 
			aggravated assault against Edward Archer. 
			 
			He later confessed to the attack and said he pledged allegiance to 
			Islamic State, police said. 
			 
			Police said in a statement on Facebook on Sunday that a policeman 
			was stopped on the street on Saturday night by a citizen who began 
			talking about Archer and the shooting that seriously wounded officer 
			Jesse Hartnett. 
			 
			"The citizen alleged the defendant had an affiliation to a group 
			with radical beliefs," police said. "The Philadelphia Police 
			Department has alerted all department personnel of this matter and 
			will continue to have officers work with a partner until further 
			notice." 
			 
			Archer, 30, is accused of approaching Hartnett, 33, and firing 11 
			rounds, some at point-blank range, through the police car window. 
			Three shots struck the officer in his arm. 
			
			  Video of the attack on Hartnett shows a man in a long robe similar 
			to the traditional dishdasha, or thobe, often worn by Muslim men in 
			parts of the Middle East, as he opened fire on the police car. 
			Police officers nearby arrested him. 
			 
			The Philadelphia Inquirer and television station NBC10 in 
			Philadelphia quoted police sources on Sunday as saying that 
			according to the tip-off Archer was associated with three other men 
			and was not the most extreme of the group. The sources said police 
			were warned the threat to them was not over, the two media outlets 
			said. 
			 
			Police did not immediately return a call from Reuters for comment. 
			 
			Anxiety over the threat posed by Islamic State in the United States 
			has risen in recent months. A Muslim couple inspired by the militant 
			group killed 14 people on Dec. 2 in San Bernardino, California, just 
			weeks after gunmen linked to the group killed 130 people in Paris. 
			People who knew the gunman told Reuters he was a devout, quiet 
			Muslim who became more "combative" after trips to Egypt and Saudi 
			Arabia. 
			 
			
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			They said he began expressing interest in Islam as a teenager, 
			played in a local Muslim football league and worked on construction 
			jobs. 
			 
			The imam of a local mosque where Archer worshipped, Asim Abdur 
			Rashid, said Archer’s Muslim name was Abdul Shaheed. He said Archer 
			had attended the West Philadelphia mosque, known as Masjid 
			Mujahideen, for at least five years. He saw him as recently as last 
			week. 
			 
			“He was intelligent, and he was a regular dude,” Rashid said. 
			 
			Rashid added that Archer regularly attended morning and evening 
			prayers, in addition to midday Friday prayers. 
			 
			FBI Special Agent Eric Ruona said Archer had traveled to Saudi 
			Arabia in 2011 and Egypt in 2012 - a trip that a family friend said 
			had changed him. 
			 
			"He became more drastic. More combative," said Jannah Abdulsalaam, 
			who asked only to be identified by her Muslim name. "He was kind but 
			I noticed that change." 
			 
			(Reporting by Kevin Murphy in Kansas City, Mo. and Idrees Ali in 
			Washington.; Editing by Cynthia Osterman, Peter Cooney, Jason Szep 
			and Simon Cameron-Moore) 
			
			[© 2016 Thomson Reuters. All rights 
			reserved.] 
			Copyright 2016 Reuters. All rights reserved. This material may not be published, 
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