President Obama on Monday expressed sympathy for the victims of the shooting in the Navy Yard in Southeast Washington and said justice must be sought.

“I’ve been briefed by my team on the situation. We still don’t know all the facts, but we do know that several people have been shot and some have been killed. So we are confronting yet another mass shooting, and it happened again on a military installation.

“I’ve made it clear to my team that we want the investigation to be seamless, so that local and federal authorities are working together.”

Obama expressed sympathy for the victims and those close to them. He called it a “tragedy.”

Obama was speaking on the fifth anniversary of the 2008 economic collapse and the progress being made.

See a full transcript of his remarks here.

Follow along with the latest updates from the shooting here.

Police say four have been killed and eight injured, and there might be as many as two shooters. They say one shooter has been taken down, but there remained an active shooter as of late Monday morning.