Friday night an FBI agent confirmed to CBS 5 a search warrant was being served on the Coolidge home of a man taken into custody that afternoon, suspected of bombing a federal office with an IED 20 miles away.
They made entry just after 9 p.m. after securing the home and making sure it was safe to go inside.
The explosion violently shook the Social Security building on Marshall in downtown Casa Grande, but it didn't injure anyone Friday morning. The blast went off before the office opened for business.
Shortly after that bombing, the Feds descended on a neighborhood in Coolidge.
Residents of the Martin Valley development said Coolidge Police blocked off their neighborhood and kept them out of their homes all day. They were finally let back in to the neighborhood around 7 p.m. Friday.
Neighbors tell CBS 5 and property records confirm the home crawling with investigators, belongs to 47-year-old Abdullatif Aldosary.
"He's pretty quiet. He don't really come out of the house," said neighbor Miguel Pascual.
It was a scene other neighbors tell CBS 5 they had witnessed before. They asked not to be identified.
Court records show Aldosary served prison time in Safford four years ago for aggravated harassment against his then employer Hunter Contracting in Gilbert, and he is currently involved in an assault and disorderly conduct case in Casa Grande.
"I was pretty shocked about it. Around this little town, who knows to expect something like this," said Pascual.
The FBI said they're investigating the explosion in Casa Grande and are "utilizing all necessary resources" including: investigative personnel, the Evidence Response Team, Special Agent Bomb Technicians and the Hazardous Materials Response Team.
The blast was caused by a device that detonated at the rear of the building, according to Agustin Avalos of the city of Casa Grande.
It happened around 8:15 a.m. in a building that houses several other downtown businesses. All of them were evacuated, Avalos said.
"It was very scary. I'm still shaking inside. I never heard anything like that," said Alicia Perez, who works in the building.
No injuries were reported and the type of device had not been determined, Avalos said. But a source close to the investigation says it appears an accelerant and some type of plastic object was used in the blast.
"I don't know what would go through somebody's mind to do that," said Patty Rodriguez who works nearby.
Witnesses inside at the time said the explosion shook the building violently.
"I was afraid to go into the back because it was so close," said Perez.
The FBI is heading up the investigation, but officials from the Bureau of Alcohol, Tobacco, Firearms and Explosives, Homeland Security and Casa Grande Police Department are also investigating, Avalos said.
Aerial news footage over the bomb scene showed extensive damage to a doorway in the back of the building and to the side of an car near the doorway.
Casa Grande is about 50 miles south of Phoenix.
Stay with cbs5az.com and CBS 5 News as this story develops.
Copyright 2012 CBS 5(Meredith Corporation). All rights reserved.
Can you identify these people? Thousands of unidentified remains are discovered every year across the United States. Just by taking a few minutes to look at these renderings and photos, you could solveMore>>
Saturday, May 18 2013 6:23 PM EDT2013-05-18 22:23:41 GMT
The National Weather Service says there is a slight risk for severe weather on Sunday, and isolated tornadoes and supercell storms are possible.The threat for severe weather will continue into Monday.StormsMore >
The National Weather Service said there is a moderate risk for severe weather on Sunday, and isolated tornadoes and supercell storms are possible.More >
Saturday, May 18 2013 2:27 PM EDT2013-05-18 18:27:31 GMT
Students are calling the death of a Harrisonville teen a rude awakening. Troopers said 16-year-old Savannah Nash pulled in front of a semi Thursday at Missouri Highway 7 and Walker Road. Savannah wasMore >
The deadly accident near Harrisonville is an opportunity for parents to talk to their teens about texting and driving, but now several smartphone companies have created apps that could put a stop to some of the dangerous behavior.More >
Saturday, May 18 2013 7:40 PM EDT2013-05-18 23:40:22 GMT
A bank on the Country Club Plaza was robbed Saturday afternoon. The FBI reported the Commerce Bank located at 47th Street and Wornall Road was robbed.They have provided little details about a suspect descriptionMore >
A bank on the Country Club Plaza was robbed Saturday afternoon.More >
Saturday, May 18 2013 6:57 PM EDT2013-05-18 22:57:19 GMT
It can be a little disconcerting spotting a wild animal in your backyard, but it's happening more and more lately. People in Mission, KS, said they're seeing coyotes near their homes – something that'sMore >
People in Mission, KS, said they're seeing coyotes near their homes - something that's becoming so common the city is offering advice on how to avoid them.More >
Saturday, May 18 2013 6:04 PM EDT2013-05-18 22:04:56 GMT
One child was sent to the hospital when a go-cart they were riding in collided with an SUV Saturday afternoon. Police said the wreck happened about 2:30 p.m. in the area of 55th Street and Cambridge Avenue.More >
Two children were sent to the hospital when a go-cart they were riding in collided with an SUV on Saturday afternoon.More >
Saturday, May 18 2013 7:38 PM EDT2013-05-18 23:38:11 GMT
It's the largest Powerball jackpot in history and Saturday night everyone's talking about the record $600 million prize. Locally, a Dearborn couple made Powerball history in November by winning half ofMore >
It's the largest Powerball jackpot in history, and Saturday night everyone's talking about the record $600 million prize.More >
Friday, May 17 2013 4:52 PM EDT2013-05-17 20:52:00 GMT
An 11-year-old girl is recovering after a distracted driver hit her and then fled.She is recovering at Children's Mercy Hospital with a broken arm, ruptured ear drum and fractured pelvis. Her family isMore >
An 11-year-old girl is recovering after a distracted driver hit her and then fled.More >
Friday, May 17 2013 7:16 PM EDT2013-05-17 23:16:53 GMT
One person has died in a crash near Harrisonville, MO, Thursday evening. The crash happened on Missouri Highway 7 and Walker Road. It involved a car and a tractor-trailer. Harrisonville is in Cass County.More >
Savannah Nash celebrated her 16th birthday last week. She died Thursday when her car slammed into a semi while she was texting during her first time driving by herself.More >
Friday, May 17 2013 6:47 PM EDT2013-05-17 22:47:09 GMT
Imagine suffering a medical emergency in a foreign country, half a world away. It happened to a man from Overland Park, KS, in Japan. Now, his family is trying to come up with a way to get him home whereMore >
An Overland Park family is trying to raise enough money to get their son back to the U.S. from Japan after he suffered a massive stroke in the other country.More >