The Islamic State (Isis) terrorist group has hailed the San Bernardino shooters as "heroes" for killing infidels. The heavily armed husband and wife identified as Syed Rizwan Farook, 28, and Tashfeen Malik, 27  killed at least 14 people and wounded 17 in mass shooting at a social services centre in Los Angeles.

The shooting is one of the worst the United States has witnessed, since the the assault on an elementary school in Newtown in 2012. The San Bernardino Police Department said that Farook was born in US, was working as an environmental inspector, and had been employed with the county health department.

His wife was born in Saudi Arabia and the couple have a six-month-old child. Since the shooting, Islamic State supporters have been posting messages praising the couple for killing the "Kuffars" (infidels).

According to Vocativ, while Isis did not take responsibilty for the attack, nevertheless its supporters were celebrating the mass shooting on US soil. The Isis supporters have also been tweeting the messages under the hashtag #America_Burning.

"Three lions made us proud," one user Tweeted. "California streets are full with soldiers with heavy weapons. The Unites States is burning #America_Burning."

"Let America know a new era #California #America_burning," said another hateful Tweet.

"God is the greatest," a third Tweet cited by Vocativ said. "May God spread fear in the homes of the Crusaders."