This doesn’t necessarily mean that jihadis planted the bomb. Maybe “right-wing extremists” have decided to copy jihadi methods. No information yet to go on. But the coincidence is striking.
“Powerful Blast Injures at Least 29 in Manhattan; Second Device Found,” by Christopher Mele, Al Baker and Michael Barbaro, New York Times, September 17, 2016:
A powerful explosion caused by what the authorities believe was a homemade bomb injured at least 29 people on a crowded sidewalk in the bustling Chelsea neighborhood of Manhattan on Saturday night, according to the police.
A few hours later, the authorities found and removed what they described as a second explosive device four blocks away, raising the possibility that two bombs had been planted in the heart of the city.
Mayor Bill de Blasio called the explosion — which occurred about 8:30 p.m. on West 23rd Street — “an intentional act” but initially said there was no connection to terrorism and no immediate claim of responsibility….
As the authorities sought to identify what had caused the explosion, they described the second device as a pressure cooker resembling the one used in the deadly Boston Marathon bombings in 2013, according to a police official, who spoke on the condition of anonymity to discuss a continuing investigation.
It was unclear whether the blast on West 23rd Street had been caused by the same type of explosive….
On Saturday night in Chelsea, the device found on West 27th Street also caused no harm.
Images shared on social media and confirmed as authentic by a senior police official showed a silver-colored piece of cookware with wires and a cellphone attached.
The official said the Police Department’s bomb squad was taking the device to a department facility in the Bronx, where robots would inspect it….