From The Associated Press:
NEW YORK (AP) — The bomb that rocked a New York City neighborhood known for its vibrant arts scene and large gay community contained residue of an explosive often used for target practice that can be picked up in many sporting goods stores, a federal law enforcement official said Sunday, as authorities tried to unravel who planted the device and why.
The discovery of Tannerite in materials recovered from the Saturday night explosion that injured 29 people may be important as authorities probe whether the blast was connected to an unexploded pressure-cooker device found by state troopers just blocks away, as well as a pipe bomb blast in a New Jersey shore town earlier in the day.
Gov. Andrew Cuomo, touring the site of the blast in Manhattan’s Chelsea neighborhood, said there didn’t appear to be any link to international terrorism. He said the second device appeared “similar in design” to the first, but did not provide details.
“We’re going to be very careful and patient to get to the full truth here,” New York’s mayor, Bill de Blasio, a Democrat, said Sunday. “We have more work to do to be able to say what kind of motivation was behind this. Was it a political motivation? A personal motivation? What was it? We do not know that yet.”
Cell phones were discovered at the site of both bombings, but no Tannerite residue was identified in the New Jersey bomb remnants, in which a black powder was detected, said the official, who spoke to The Associated Press on condition of anonymity because the official was not authorized to comment on an ongoing investigation.
Authorities said the Manhattan bombing and the blast 11 hours …