A terror suspect detained over the Manhattan and New Jersey bombings faces being charged with five counts of attempted murder.

Ahmad Khan Rahami, a naturalised US citizen from Afghanistan who had been described as "armed and dangerous" by the FBI, is in custody after he was injured in a gun battle with police.

The 28-year-old man also faces two gun charges, according to a law enforcement source.

Authorities are currently not looking for anyone else over the bombings and do not believe he was part of a wider cell.

But New York mayor Bill de Blasio said: "We have every reason to believe this was an act of terror."


Image: Ahmad Khan Rahami pictured after he was detained

He was pictured on a stretcher being taken into an ambulance, with a bloodied bandage on his right arm and moving his head from side to side with his eyes open.

The suspect was sleeping in the doorway of a bar when the owner reported him to police and an officer went to investigate and recognised him as Rahami.

Police said the man pulled out a gun and shot the officer, who was wearing a bullet-proof vest, in the chest and then a shootout erupted with other officers before Rahami was captured.

A second officer was injured in the hand in the gun battle in Linden, New Jersey. Both are expected to recover.

Rahami, who was not on US anti-terrorism databases, was later having surgery on his leg following a gunshot wound.

:: Who is bombings suspect Ahmad Khan Rahami?

Image: The aftermath of the gun battle in Linden, New Jersey

The development in the fast-moving investigation came after five suspicious devices were discovered in a rucksack in nearby Elizabeth, one of which exploded as a bomb squad robot tried to disable it.

FBI agents raided an apartment where Rahami lived with his Muslim family above their fried chicken restaurant in Elizabeth, close to where the devices were found late on Sunday.

The discovery followed a series of attacks in the US over the weekend.

Two officers injured arresting NY suspect

Twenty-nine people were injured in a bomb blast in the busy Chelsea district of Manhattan on Saturday evening. A second unexploded device was found nearby.

Rahami was believed to have been caught on CCTV at the bombing scene.

:: Bloody aftermath of bomb caught on video

Earlier there had been an explosion in nearby New Jersey, and there was also a knife attack in Minnesota later that day, which wounded eight.

Authorities have now linked the explosive devices in both New York and New Jersey - an official said all three used a flip-style mobile phone.

US attacks: Timeline of events

But President Barack Obama said the Minnesota stabbings do not appear to be connected to the bombings.

:: Manhattan bomb: What clues are there for investigators?

Meanwhile, New York governor Andrew Cuomo, having previously ruled out a link between the Manhattan bombing and international terrorism, has now acknowledged "it may be foreign related".

Fireball as New Jersey bomb explodes

Five men had already been detained and questioned over Saturday's bomb attack in Chelsea, after the FBI stopped "a vehicle of interest" in Brooklyn on Sunday night.

It has been reported the bomb that detonated in Manhattan, and a second unexploded device, were both shrapnel-filled pressure cookers, similar to those used in the attack on the Boston Marathon in 2013.

New Video of injured New York bomb victims

The string of attacks began on Saturday morning after a small pipe bomb exploded in the New Jersey town of Seaside Park, shortly before a charity run for US marines and sailors. No one was injured.

The devices in Elizabeth, which were left in a bin, were discovered after two men "saw wires and a pipe".

The security alert came as nearly 1,000 extra police were deployed on New York's streets as world leaders met for a UN summit on the refugee crisis.

Image: Ahmad Khan Rahami had been sought by police