Barack Obama
Barack ObamaReuters

President Barack Obama says that the US "will not be terrorized," after ISIS congratulated Syed Farook and Tashfeen Malik for killing 14 people in California this past week.

Malik swore allegiance to ISIS on her Facebook account and the FBI says that it is treating the incident as an act of terror. "It is entirely possible that these two attackers were radicalized to commit this act of terror," acknowledged President Obama.

During his weekly address to the public, Obama said, "We are Americans. We will uphold our values - a free and open society. We are strong. And we are resilient. And we will not be terrorized."

Twenty-eight-year-old Farook and his 29-year-old wife killed 14 and wounded another 21 before being themselves killed by police. ISIS has not taken explicit credit for the attack, though it calls the pair "soldiers" who were "killed in the path of Allah."

This was the most deadly shooting in the US since the 2012 attack at a school in Newtown, Connecticut.

If this week's attack was indeed terror-related, it would be the bloodiest terror attack in the US since September 11, 2001.