LITTLE ROCK - A Muslim convert accused of killing a soldier Monday outside a recruiting center may have been considering other targets including Jewish and Christian sites - and had the firepower to carry out more attacks, according to law-enforcement officials.

A joint FBI-Homeland Security intelligence assessment obtained by the Associated Press said officers found maps to Jewish organizations, a child-care center, a Baptist church, a post office, and military recruiting centers in the Southeast and in New York and Philadelphia.

"Out of an abundance of caution, and in light of newly discovered information, the FBI cannot rule out additional subjects, targets, or the potential for inspired copycats who might act out in support of the original act," the intelligence assessment said.

Abdulhakim Muhammad, 23, of Little Rock, targeted soldiers "because of what they had done to Muslims in the past," authorities said, saying he had said he wanted to "kill as many people in the Army as he could."

Pvt. William Long, 23, was killed and Pvt. Quinton I. Ezeagwula, 18, was wounded in Monday's shootings outside Little Rock. Both recently completed basic training and had never seen combat. They had volunteered to help attract others into military service, and were shot as they smoked cigarettes outside the recruiting center.

Muhammad, formerly known as Carlos Bledsoe, was being held without bond on one count of capital murder and 16 counts of committing a terrorist act. He pleaded not guilty in state court Tuesday to the charges, which could bring the death penalty.

FBI spokesman Richard Kolko said the bureau was also investigating.

In documents released Tuesday, authorities said they recovered Molotov cocktails, three guns, homemade silencers, and ammunition from Muhammad's truck after the attack. Investigators also searched a computer linked to Muhammad and found research into multiple sites in different states, according to the intelligence memo.

New York Police Commissioner Ray Kelly said investigators had found Google Earth images of various places, including Times Square.

A law-enforcement official said Muhammad had been under investigation by an FBI-led terrorism task force since he returned from Yemen last year.