Lewisville police say no one else was injured.
Police say they were called to the Vista Ridge Mall about 4 p.m. Monday after reports of an argument between a woman working at a kiosk and someone described as a male acquaintance who had confronted her.
Police spokesman Capt. Kevin Deaver says the man pulled a handgun and shot himself when mall security tried to escort him outside.
The man was pronounced dead at a hospital. His name was not immediately released.
The mall was not evacuated but parts remained closed after the shooting as police were investigating.
Lewisville is 20 miles northwest of Dallas.
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