The third explosion in the Turkish town of Reyhanli, close to the Syrian border, appears to have been a smaller blast caused by a car engine or a building boiler room, local reporters have told Reuters.
It followed two car bombs that exploded in the early afternoon in the city and killed around 40 people.
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At least one person has died and 18 homes have been destroyed as wildfires rage through southern California.
Slightly cooler temperatures will replace the recent muggy weather while some areas will see heavy rain.
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