The crowd funneled out of the Edward Jones Dome, the home of the
St. Louis Rams National Football League team, after about 9 p.m.
local time (0200 GMT), the gas utility and the St. Louis Fire
Department said in a statement.
Two people were treated at the scene and one was sent to hospital,
all with unspecified injuries, it said.
People attending a beauty convention began leaving on their own
after they got whiffs of the smell of burning plastic and then gas,
local media reported.
Fire officials also ordered people away from the downtown building
for at least an hour while Laclede ran tests which ultimately found
no natural gas leak, fire officials and the company said.
"We don't know what the source is but we do know it's not natural
gas," said Jenny Gobble, a Laclede spokeswoman.
(Reporting by Eric M. Johnson in Seattle;
editing by Pravin Char)
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