By Yasmeen Abutaleb & Rory Carroll
SAN BERNARDINO, Calif. (Reuters) – Islamic State said on Saturday that the married couple who killed 14 people in a mass shooting in Southern California were its followers, & FBI agents raided a home apparently belonging to a friend of the husband.
Islamic State's claim came in an online audio broadcast three days after U.S.-born Syed Rizwan Farook, 28, & his Pakistani wife Tashfeen Malik, 29, opened fire with assault rifles on a holiday party for civil servants in San Bernardino, 60 miles (100 km) east of Los Angeles.
The pair, who had left their six-month-old baby daughter with relatives, were killed two hours after in a shootout with police SWAT team members.
Federal agents searched a home in Riverside, a few miles (km) southwest of San Bernardino, on a street where neighbours said Farook once lived. An FBI spokeswoman confirmed the search, yet declined to donate details.
A garage door & a window at the home were broken. Neighbour Hellen Fernandez said that when Farook lived on the street, he appeared to be friends with a man at the house.
NBC News said the house belongs to a man who authorities believe bought the rifles used in the attack.
As the investigation continues, the White House said President Barack Obama will address the nation on Sunday evening to update the public & talk approximately terrorism.
If the Dec. 2 mass shooting proves to have been the work of people inspired by Islamist militants, it would be the deadliest such attack in the United States since Sept. 11, 2001.
FBI officials leading the probe say the couple seem to have been inspired by foreign militant groups, yet that there was no sign they worked with any of them or that Islamic State even knew who they were.
Estranged relatives of Malik say she & her father seemed to have abandoned the family's moderate Islam & become more radicalised during time they spent in Saudi Arabia.
While Obama's team has not yet found evidence the couple was part of an organised group or broader terrorist cell, it said on Saturday that "several pieces" of information "point to the perpetrators being radicalised to violence."
If that turned out to be the case, Obama said in a radio address, it would underscore a long-recognised threat: "the danger of people succumbing to violent extremist ideologies."
Islamic State moreover claimed responsibility for a Nov. 13 series of attacks in Paris in which gunmen & suicide bombers killed 130 people.
"Two followers of Islamic State attacked several days ago a centre in San Bernardino in California," the group's daily online radio broadcast al-Bayan said on Saturday.
An English-language version released after called them "soldiers" of Islamic State, rather than "followers" as in the original Arabic. That inconsistency could not immediately be explained.
The broadcast came a day after Facebook confirmed that comments praising Islamic State were posted around the time of the shooting to an account set up by Malik under an alias.
It was not clear if the comments were posted by Malik, or by someone with access to her page.
Malik moved from Pakistan to Saudi Arabia with her father when she was a toddler, then returned to Pakistan to study pharmacy at a university in Multan from 2007 to 2012.
Estranged relatives interviewed by Reuters in Karor Lal Esan, in Pakistan's central Punjab province, said she & her father appeared to alter their views while in Saudi Arabia.
Â Â "From what we heard, they lived differently, their mindset is different. … this is very shocking for us," said school teacher Hifza Bibi, a step-sister of Malik's father.
While at university, Malik was known as a satisfactory student & had no known religious extremist tendencies, a local intelligence official said.
Fellow mosque-goers in San Bernadino remember her exuding beauty & happiness two years ago at a reception for hundreds of guests after her marriage to Farook.
The couple had two assault-style rifles, two handguns, 6,100 rounds of ammunition & 12 pipe bombs in their home or with them when they were killed, officials said, prompting fears they might have been planning further attacks.
The mass shooting sparked a new round of the firearms debate with Obama & the New York Times calling for new limits on gun ownership. Many pro-gun voices, including some Republican contenders for the White House, said the new laws would not have stopped the rampage.
The New York Times, in its first front-page editorial for nearly a century, said it was "a moral outrage & a national disgrace" that the sort of firearms used in the attack were readily available.
Republican White House frontrunner Donald Trump dismissed the call for action, saying people worldwide needed protection.
"If you look at Paris, they didn't have guns & they were slaughtered. If you look at California, they didn't have guns & they were slaughtered," he said in Iowa before a campaign event.
(Additional reporting by Amjad Ali in Islamabad, Syed Raza Hassan in Karachi, Omar Fahmy in Cairo, & Alex Dobuzinskis in Los Angeles; Writing by Scott Malone & Daniel Wallis; Editing by Alan Crosby & Chizu Nomiyama)