As many as four people were killed and 14 were wounded after a gunman in uniform opened fire at Fort Hood on April 2, shutting down the sprawling Army base and inciting a huge police response. The shooting echoed the deadly rampage carried out there in 2009 by an officer who turned on his fellow soliders.

Officials at Fort Hood released few details about the shooting but said that it appeared that the gunman was among the dead. Reports of the shooting sent dozens of local, state and federal law enforcement officials rushing to the base in Killeen, Texas, as they had back in November 2009.

In Chicago, President Barack Obama described the shooting as a fluid situation that the White House and Pentagon officials were closely following. “We are going to get to the bottom of exactly what happened,” the President said. “We’re heartbroken something like this might have happened again.”

The Chairman of the Joint Chiefs of Staff, General Martin Dempsey, said that many questions remained but that their focus was on supporting the victims and their families. “This is a community that has faced and overcome crises with resilience and strength,” he said in a statement.