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TOPSHOT - Police and first responders walk down a blocked off road near the site of an alleged bomb explosion on West 23rd Street on September 17, 2016, in New York.
An explosion in New York's upscale and bustling Chelsea neighborhood injured at least 25 people, none of them in a life-threatening condition, late Saturday, the fire department said. / AFP / Bryan R. Smith        (Photo credit should read BRYAN R. SMITH/AFP/Getty Images)
TOPSHOT - Police and first responders walk down a blocked off road near the site of an alleged bomb explosion on West 23rd Street on September 17, 2016, in New York.
An explosion in New York's upscale and bustling Chelsea neighborhood injured at least 25 people, none of them in a life-threatening condition, late Saturday, the fire department said. / AFP / Bryan R. Smith        (Photo credit should read BRYAN R. SMITH/AFP/Getty Images)

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    Weekend of attacks in the US

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Weekend of attacks in the US

Between September 17 and 18, there were several explosions and a stabbing attack in the US. All incidents are being investigated as possible terror acts.

Weekend of attacks in the US

Between September 17 and 18, there were several explosions and a stabbing attack in the US. All incidents are being investigated as possible terror acts.