New York bombs 'were both shrapnel pressure cooker devices'
Suspicious devices found near New Jersey station
(35 minutes later)
The bomb detonated on Saturday in New York, and a device found nearby, were both shrapnel-filled pressure cookers - similar to the bombs used at the 2013 Boston marathon, US media report.
A suspicious device found near a New Jersey railway station exploded as a bomb squad was attempting to disarm it with a robot, officials say.
Citing officials, separate reports said both had mobile phones and Christmas lights as makeshift detonators.
It was one of up to five devices found in backpack inside a rubbish bin near the station in Elizabeth, according to the city's mayor. No-one was hurt.
The blast, in the Chelsea area of Manhattan, injured 29 people.
The discovery came after three attacks at the weekend - bombs in New York and New Jersey, and stabbings in Minnesota.
The FBI said it stopped a "vehicle of interest" in Brooklyn on Sunday but made no arrests.
The explosion in New York's Chelsea area injured 29 people.
In Elizabeth, New Jersey, police detonated a device on Monday following concerns it was a live bomb.
"That was not a controlled explosion," said Mayor Christian Bollwage, adding that the blast happened as a robot examining a device cut a wire.
The bag containing a number of devices was picked out of a bin by two men who thought it could contain something of value.
"They started to examine the backpack is when they found the wires and the pipes and they dropped the backpack, walked around the corner, went in to police headquarters and notified us right away," he said.
In New York City, the FBI said it had stopped a "vehicle of interest" in Brooklyn on Sunday but made no arrests.
Five people were taken into custody for questioning, officials told US media. But a spokeswoman said no-one had been charged and the investigation was continuing.
Five people were taken into custody for questioning, officials told US media. But a spokeswoman said no-one had been charged and the investigation was continuing.
The Manhattan blast followed a pipe bomb explosion on the route of a charity race in New Jersey.
Both the bomb that detonated on Saturday in Chelsea, and a device found nearby, were shrapnel-filled pressure cookers - similar to the bombs used in the attack on the 2013 Boston marathon, US media report.
Investigators are also examining a suspicious device found near a train station in Elizabeth, New Jersey, late on Sunday.
They appeared to be "similar in design", New York Governor Andrew Cuomo said.
Elizabeth Mayor Christian Bollwage said a bomb squad had determined the device containing wires and pipes could be a live bomb.
It comes after several attacks in the US over the weekend:
Reporters for two US news outlets said a loud explosion was heard in the area early on Monday.
'People running for their lives'
New York Governor Andrew Cuomo said a second device discovered over the weekend in New York City appeared to be "similar in design" to the exploded device.
It was found four blocks from the site of the blast and was removed and later destroyed in a controlled explosion. No-one was hurt.
Some 1,000 extra security personnel are being deployed to New York's transport hubs.
Some 1,000 extra security personnel are being deployed to New York's transport hubs.
Authorities have described the weekend bombings in New York and New Jersey, along with a stabbing attack in Minnesota, as acts of terror and are trying to establish whether there are any links between them.
Authorities have described the weekend bombings in New York and New Jersey, along with a stabbing attack in Minnesota, as acts of terrorism and are trying to establish whether there are any links between them.
But they say they were so crude that it is unlikely an international group was behind them.
But they say they were so crude that it is unlikely an international group was behind them.
So-called Islamic State has said the suspected attacker in Minnesota was one of the group's "soldiers", although it is not clear whether it was involved in planning the assault.
So-called Islamic State (IS) has said the suspected attacker in Minnesota was one of its "soldiers". It is not clear whether IS was involved in planning the assault.
Windows blown out
The Chelsea explosion occurred at about 21:00 (01:00 GMT on Sunday) on West 23rd St. The force of the blast blew out windows and could be heard several blocks away.
Some reports said the bomb went off in a black metal construction toolbox, others that it was in a rubbish bin.
Chelsea is among the most fashionable districts of Manhattan and its bars and restaurants are usually crowded at the weekend.
Mayor Bill de Blasio said there would be a "bigger than ever" police presence in New York in the coming week.
On Tuesday, President Barack Obama and other world leaders are due to attend the UN General Assembly in New York.
No quick answers - mayor:
How the election candidates reacted - BBC's Anthony Zurcher
Governor Andrew Cuomo called it a politician's "nightmare scenario" - a late-night phone call with news of a crisis. The weekend's attacks in New York, New Jersey and Minnesota have put national security squarely back in the centre of the US presidential election.
A similar scenario unfolded in June following the Orlando nightclub shootings. That was an opportunity for Donald Trump - the "change" candidate who touts his hard line on security issues - to make his case... and he blew it. Mrs Clinton's lead grew as Americans soured on Mr Trump's bellicose response.
This time Mr Trump has been more measured, offering only condolences on Twitter. He did call the New York incident a "bombing" before official confirmation and said the US needed to "get tough", but that was hardly comparable to his jarring comments on Orlando.
Meanwhile, Mrs Clinton cautioned against premature conclusions - perhaps hoping her opponent would again overreact.
With the race tight once again and the first TV debate just over a week away, both candidates are under intense pressure to display their leadership qualities. Saturday's "nightmare scenario" was another test - and it probably won't be the last.
