Quote:A man who had fired a gun inside a ticketing area at Houston's largest airport was killed after being confronted by a law enforcement official during an incident that sent people in the terminal scrambling and screaming, police said Thursday.

It's unclear if the man, identified by the FBI as 29-year-old Carnell Moore of Beaumont, fatally shot himself or was killed by a Homeland Security agent who had confronted him.

According to authorities, Moore left behind a suicide note, in which he said he didn't want to hurt anyone, but that, "The monster within is getting stronger."

It was around 1:35pm Thursday that Houston police say they were called to a "discharge of firearm" at Terminal B.

Police say Moore walked into the ticketing area in Terminal B at Bush Intercontinental Airport and fired at least one shot into the air. The agent, who was in his office, came out and confronted Moore, telling him to drop his weapon, but he refused, police said.

"The suspect then turned toward the special agent. The special agent, fearing for his safety and all the passengers in the terminal, discharged his weapon at the same time it appears the suspect may have shot himself," Houston police spokesman Kese Smith said.