NEW YORK (AP) — Authorities are looking for a naturalized Afghanistan citizen for questioning in a weekend explosion in a Manhattan neighborhood that injured 29 people as the governor conceded Monday that investigators could no longer rule out international terrorism. She wouldn’t provide further details, but a government official and a law enforcement official who were briefed on the investigation told The Associated Press that five people in the car were being questioned at an FBI building in Manhattan. Cellphones 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 wasn’t authorized to comment on an ongoing investigation and spoke to the AP on condition of anonymity. Police spokesman J. Peter Donald said on Twitter that the explosion happened at about 8:30 p.m. Saturday on West 23rd Street, which is a major thoroughfare with many restaurants. Hillary Clinton says she has been briefed “about the bombings in New York and New Jersey and the attack in Minnesota.”

She says the nation needs to support its first responders and “pray for the victims.”

“We have to let this investigation unfold,” she said. “This is a bomb.”

Caldwell reported from Washington.
A bombing occurs in the Chelsea neighborhood of Manhattan injuring 29 people.