MADRID, Nov. 1 (UPI) -- Three women were killed and three others severely injured by a panicked crowd at a Halloween celebration early Thursday morning in Madrid, police say.
The victims, all 18 to 25 years old, were knocked down and trampled by a crowd at a large hall, Cadena Ser radio network/Agenzia Giornalistica Italia reported Thursday.
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Three women suffered cardiac arrest and died, officials said.
Police said the crowd of about 10,000 people rushed to leave the building after a flare was reportedly fired about 4 a.m. All but one of the doors in the building had been locked.
An investigation was under way.
