The questioning of terror suspect Najibullah Zazi resumed Friday morning at the Federal Building.

Wednesday, the FBI evacuated two apartment buildings "for safety reasons" as they searched the home of terror suspect Najibullah Zazi. They also raided another home not far away that belongs to members of Zazi's family.

All this was happening as Zazi, 24, was meeting with FBI agents at Denver's FBI headquarters. Zazi met with investigators from 2 p.m. until 10:30 p.m. on Wednesday. 9Wants to Know has learned Zazi met with agents again Thursday from shortly after 2 p.m. to 11 p.m. The questioning was scheduled to resume Friday around 9 a.m.

9Wants to Know has learned Zazi agreed to give investigators, fingerprints, DNA and handwriting samples.

According to The Denver Post, Zazi is exhausted by the questioning and because of the daylight fasting observed during Ramadan.

On Thursday afternoon, Zazi's attorney, Arthur Folsom, said his client looked forward to the second day of questioning because Zazi believes it's a step closer to clearing his name.

"They've been asking very detailed questions and my client has been answering all the questions and today I presume we'll pick up where we left off and continue providing the information," Folsom said.

During Wednesday's questioning, Zazi answered every question posed by FBI agents except for one. But Folsom says that Zazi was prepared to answer that question on Thursday. He did not say what the question was.

"He understands the only way to clear his name is to cooperate fully, so that's what we're doing," Folsom said.

"There were a significant number of questions about individuals in New York, what his relationship is with each of them, how long he's known them and where he met them. We spent time talking about what went on while in New York and what he saw, who he talked to, times, dates and places, his reason for going there," Folsom told 9Wants to Know Wednesday night about the first meeting.

Tuesday, Zazi told 9Wants to Know in his first interview with the media that he's not a terrorist and the FBI has the wrong man.

Zazi's name surfaced after federal sources told WNBC-TV in New York agents had been monitoring the Arapahoe County man after he drove a rental car to New York.

Federal officials stepped up their investigation after Zazi rented the car Sept. 9 in Colorado and drove to New York. He told the Denver Post he was traveling there to deal with an issue over a coffee cart that his family owns in Manhattan. While he was in New York, police stopped him on a bridge leading into the city and searched the rental car and his laptop computer. Police later towed his car, and Zazi said he suspected he was being watched.

FBI agents executed search warrants at an apartment in Queens, New York on Monday as part of the investigation. NBC News has learned they seized nine backpacks in the raid.

Zazi flew back to Colorado and learned about the raids in Queens after friends called him.

Zazi told 9Wants to Know he went to New York recently to visit friends. Zazi says anyone who thinks he's done something illegal is wrong.

On Thursday, the Associated Press quoted an unnamed official as saying that Zazi had contact with a known al-Qaeda associate and that agents had been monitoring five people in Colorado, including Zazi.

As part of the investigation, The Denver Post reports that investigators have also checked taxi cab and shuttle drivers at Denver International Airport and have used dogs to check cabs and shuttles.

Zazi works at ABC Shuttle in Aurora. It operates at DIA.

He lives in the Vistas at Saddle Rock near East Smoky Hill Road and South Versailles.

Wednesday afternoon, the FBI raided Zazi's apartment and evacuated the buildings around Zazi's unit. Three people: two women and one man, were taken out of Zazi's apartment. They were not handcuffed. The two women were in traditional Muslim dress. The three left in a government vehicle with FBI agents.

The evacuations were lifted a little more than an hour later.

FBI investigators in protective suits were in Zazi's apartment along with dogs during the search.

The FBI also served a search warrant at a house on East Ontario Drive not far from South Tallyns Reach Parkway on Wednesday afternoon.

No evacuations were ordered there. FBI agents in protective suits were on scene. Neighbors say they saw investigators taking items out of the home and dusting things inside the home.

According to the Post, the home belongs to Zazi's aunt and uncle, Naquib Jaji. At Jaji's house, according to the Post, neighbors gathered in front of the home as authorities worked beneath a fly tent wrapped in blue tarps. Eight children were put in a red van and driven away.

Jaji said Tuesday that Zazi lived at the house briefly before moving to the apartment on Smoky Hill Road.

The Post has also learned that Zazi filed for Chapter 7 bankruptcy in March after he had amassed more than $50,000 in credit card debt.

According to NBC News, federal officials have had Zazi under surveillance for quite some time.

NBC News reports that authorities found documents in Zazi's rented car that contained formulas for making explosives. Investigators in Colorado are now checking to see whether he recently bought any bomb-making ingredients.

No charges have been filed.

Zazi has not been arrested. Three others interviewed during the raids in Queens on Monday in several residences as part of the terrorist investigation were not arrested either.

Recently, the FBI and Homeland Security asked local police departments nationwide, including Denver, to be on the lookout for materials that could be used to make explosives and for people with burn marks on their hands, faces or arms, according to WNBC-TV.

Bruce Finley, Tom McGhee, Felisa Cardona, Mike McPhee, John Ingold and Kevin Vaughan of the Denver Post contributed to this story.