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http://www.dailymail.co.uk/news/article-3670535/Pro-ISIS-twitter-account-threatens-attacks-London-Heathrow-Los-Angeles-New-York-s-JFK-airports-July-4-weekend.htmlby: Charlie Moore
* Account warned there would be a 'device placed' at one of the airports
* Threat was revealed by respected counter-terror group SITE Intelligence
* It comes three days after suicide bombers killed up to 50 in Istanbul
* ISIS also claimed responsibility for Friday's attack on cafe in Dhaka, Bangladesh
* TSA already expecting chaos as record 43 million Americans travel
* Airports and train terminals on high alert for the holiday weekend A pro-ISIS twitter account has threatened attacks at London Heathrow, LAX and New York's JFK airports over the July 4 holiday weekend.
The account said that attacks would be carried out on planes 'flying from Heathrow [Airport] to the US' and warned that 'there will be a device placed in either Heathrow, LAX or JFK airports.'
The threat was revealed by SITE Intelligence Group - the world's leading non-governmental counterterrorism organization - on its website.
This comes as authorities in the US brace themselves for a weekend of traffic chaos as it was revealed that up to 43 million people will be travelling across the country for Fourth of July weekend.
Huge firework displays will take place across the nation, as well as concerts and family fun days.
On Thursday, the FBI said there are no specific or credible security threats against the United States known to law enforcement heading into the Fourth of July weekend.
'However, law enforcement and members of the public must remain vigilant. ... The FBI asks members of the public to maintain awareness of their surroundings and to report any suspicious activity to law enforcement,' an FBI spokeswoman said in a statement to Reuters.
An internal briefing document shared with government officials and seen by Reuters called for the Department of Homeland Security to be on alert following recent attacks, such as the mass shooting in Orlando, Florida, on June 12, and calls from Islamic State supporters for attacks in the Western Hemisphere.
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