Four U.S. marines were killed and three people were injured in shootings at two separate military sites Thursday in Chattanooga, Tennessee. The shooter, who died in a firefight, has been identified as 24-year-old Mohammod Youssuf Abdulazeez, a Kuwait-born naturalized U.S. citizen who attended high school and college in Chattanooga. President Obama spoke after the shooting.

President Obama: I’d ask all Americans to pray for the families who are grief-stricken at this point. And I want everybody to understand that we will be thorough and prompt in figuring out exactly what happened.”

In a press conference, the FBI said the agency does not have “anything that directly ties” the suspected shooter to any international terrorist organization.