The blast at the two-storey building in Aliso Viejo, south of Los Angeles, also injured two people.
But that information was also revised during the course of the investigation. Investigators said they hadn't yet located an explosive device and were searching through debris.
The officials were briefed on the investigation but not authorized to discuss the matter publicly and spoke to the AP on condition of anonymity.
While the office building has since been deemed safe, all businesses on Mareblu were closed Wednesday amid the ongoing investigation, according to a tweet from the city of Aliso Viejo. Officials said no children were injured.
Associated Press writer Michael Balsamo in Los Angeles contributed to this report.
FBI agents searched a home near Rancho Santa Margarita
At least one person was killed and three others injured as an explosion and fire tore through a medical building in Aliso Viejo, Orange County, at around 1.10 p.m. on Tuesday afternoon.
The blast blew siding off the walls, exposing insulation and framing and shattering windows at the two-story building that houses medical offices.
Mary McWilliams told The Orange County Register that she arrived for an appointment to find smoke in the area and auto alarms going off.
Fire officials said a third person suffered smoke inhalation.
"There were police and fire officials from Orange County; the FBI; ATF and Homeland Security", Karson says.
Judge rejects Manafort attempt to dismiss criminal case
Manafort joined the Trump campaign in March 2016 and resigned that August amid news reports about his activities in Ukraine. The judge deemed that the indictment "falls squarely within that portion of the authority granted to the Special Counsel".
Two survivors had critical injuries "that were consistent with an explosion, but not necessarily consistent with a bomb", said Carrie Braun, a spokeswoman for the Orange County Sheriff's Department. Dave Sawyer said Tuesday night that the size of the explosion makes it suspicious.
"We have not found any type of specific device inside of the building right now that would tell us or lead us to exactly what the device was - if there was a device", Sawyer said. Other people could be scene wheeling cribs down the street as the area was evacuated.
A deputy stands watch as the Orange County hazmat team and bomb squad investigate the scene of an explosion in Aliso Viejo on Tuesday, May 15, 2018. ". I saw two women come out full of blood, hair singed, just glass stuck to the hair, glass stuck to their bodies".
One woman, who had skin peeling on her arm from burns, said, "Take care of my mother", McWilliams said. The other woman was burned and her head was bleeding.
A federal official told The Associated Press late Tuesday that the explosion is believed to have been intentional and may have come from a package.
Special police forces from Kandahar and commandos from Herat had also been deployed in Farah , Afghan officials said . In 2017 insurgents tried three times to overrun the capital, according to the Afghanistan Analysts Network.
That pressure ultimately told with the final delivery of the eighth over when Rankin had Azhar Ali all squared-up. Just before stumps was called, Ashraf slammed spinner Paul Stirling over long on for the only six of the day.
He proposed political newcomer Quim Torra as his successor, urging the next regional executive to build an independent country. Catalonia has been in political limbo since December past year when pro-independence parties won early elections.
Snapped in the city last night, Salman Khan was seen visiting his Race 3 producer Ramesh Taurani at his office in Bandra. Meanwhile the Salman Khan factor should ensure that the film takes a bumper opening all over.
If you've been enjoying Fortnite's most recent and also most ambitious LTM yet, you better treasure it while it lasts. In other Fortnite news, the way the Battle Royale genre was taken over the world was highlighted by a recent stat.
The USD 500 billion retail titan has disclosed in a US SEC filing that it might take Flipkart public in as early as four years. Furthermore, Walmart has shed some light on its plans to come out with an initial public offering (IPO) for Flipkart.
However, considering the European ambitions of the Sheikh Mansour-owned club, Guardiola has a more arduous task at hand. He has been replaced by the 38-year-old veteran Sergei Ignashevich, who is coming out of global retirement.
A recent rumor has suggested that the Galaxy S10 will be the first Samsung device to feature an in-display fingerprint sensor. Earlier this year, Samsung Galaxy J6 listing on benchmarking site Geekbench gave out detailed specifications of the phone .
The second attack involves attackers being able to use their knowledge of parts of an email to crack its encryption . Ultimately, if you don't use PGP or S/MIME for email encryption, then there's nothing to worry about.
Kucherov snaps out of funk in must win game for Lightning
Did the Lightning feel they owed their goalie one, after hanging him out to dry for 10 goals in the first two games? "We checked. Both teams entered the game red-hot on the power play, and the Lightning's unsafe extra-man unit continued its terrorizing ways.
HTC Exodus is a blockchain smartphone, coming soon
Sirin Labs announced a $999 United States dollars blockchain phone previous year , a device reportedly being made by Foxconn. It will also be interesting to know whether or not the HTC Exodus will employ a sandboxed environment for tighter security .
Seattle's Robinson Cano suspended 80 games for PED use
He is making $24 million this season, so the expected almost 50 percent of his 2018 pay is now going away with the suspension. In 39 games this year, the 35-year-old Cano had a slash line of.287/.385/.441, with four home runs and 23 RBIs.
It stays on the field - Noble calms Pogba pitch spat
United manager Jose Mourinho thought the referee got it right on the night, telling reporters: "It was handled well". Moyes signed a deal until the end of the season, tasked with keeping the Hammers in the Premier League.