Live updates: 1 person dead, 4 injured in Washington, D.C., gym shooting; shooter deceased

One person who was injured is in critical condition, police said.

The suspect has been pronounced dead, according to two federal law enforcement sources and a law enforcement official.

The gunman spoke with police over the phone while he was barricaded in a nearby apartment building, Carroll, the interim chief of the Metropolitan Police Department, told reporters.

"At which time, they heard a gunshot, and he stopped communicating with them," he said.

Carroll said authorities then entered the apartment and discovered the suspect with a self-inflicted gunshot wound.

Police said they believe the apartment belonged to the suspect, who has not been named.

The interim chief of the Metropolitan Police Department told reporters that law enforcement knows the shooter had a handgun "at one point in time," but that "we don't know if there's other weapons that are involved."

That answer, he added, will be discovered as the investigation continues.

Vida Fitness posted a message on social media informing members that its Logan Circle location is temporarily closed after the shooting.

"The safety and well-being of our members, guests, and team are our highest priorities. We ask that you avoid traveling to the Logan Circle location and surrounding area until…

Original source: https://www.nbcnews.com/world