Key Facts

• The shooting began Thursday morning inside a gym in an apartment building in Logan Circle, about a mile north of the White House.
• One person was killed and four others were injured.
• One injured person is in critical condition; the other three have non-life-threatening injuries.
• Police said the suspect barricaded himself in an apartment and fired through the door at officers at least twice.
• Negotiators lost contact with the suspect after hearing a gunshot, police said.
• Officers later found the suspect with what appeared to be a self-inflicted gunshot wound.
• Police said a fire had been set and was contained.
• Authorities said they were still investigating the timeline, the suspect’s motive, and a possible conflict involving the apartment building.