Donald Trump declared a "bomb went off" in New York City, and suggested it was linked to terrorism, before officials had released any details on the blast which ripped through the Chelsea neighbourhood of Manhattan injuring at least 29 people.

Hillary Clinton also said she had been briefed "about the bombing", but refused to comment further until more "facts" became clear - and suggested her presidential rival should have done the same.

Amid confusion over the cause of the explosion,, the Republican candidate appears to have jumped the gun.

He made the announcement minutes after stepping off his plane during a rally at an airport hangar in Colorado Springs, Colorado.

"I must tell you that just before I got off the plane a bomb went off in New York and nobody knows what's going on," Mr Trump said.

He continued: "But boy we are living in a time - we better get very tough, folks. We better get very, very tough. It's a terrible thing that's going on in our world, in our country and we are going to get tough and smart and vigilant."

Ms Clinton said she had been briefed "about the bombings in New York and New Jersey and the attack in Minnesota". In New Jersey, a pipe bomb was detonated along the route of a 5k run for US Marines, while in St Cloud, Minnesota, police said multiple people were injured in a gun and knife attack at a shopping mall on Saturday evening. The suspect was reported to be dead.

Speaking on her campaign jet, she said she would respond further "when we actually know the facts".

Asked specifically about her reaction to Mr Trump describing the blast as a "bomb" and alluding to it as an attack, she said: "It's important to know the facts about any incident like this.

In pictures: New York bomb explosion Show all 25 1 /25 In pictures: New York bomb explosion In pictures: New York bomb explosion A police robot accidentally detonated one of five explosive devices left outside a train station in New Jersey. Officials said the bomb squad robot cut a wire on the mechanism in a bid to defuse it - but instead set off an explosion. The device had been left in a backpack and placed in a bin outside the train station in Elizabeth Universal News And Sport (Europe In pictures: New York bomb explosion A member of the New York City Police Department stands guard in Herald Square Getty Images In pictures: New York bomb explosion New York Mayor Bill de Blasio (3-R) and New York Governor Andrew Cuomo (2-R) tour the site of an explosion that occurred in the Chelsea neighborhood of New York Getty Images In pictures: New York bomb explosion New York Mayor Bill de Blasio and New York Governor Andrew Cuomo tour the site of an explosion that occurred in the Chelsea neighborhood of New York on September 18, 2016. The bomb that exploded in New York AFP/Getty In pictures: New York bomb explosion A genral view down the street near the site of an explosion that occurred in the Chelsea neighborhood of New York AFP/Getty Images In pictures: New York bomb explosion New York City Mayor Bill de Blasio (L) and New York Gov. Andrew Cuomo hug after touring the site of the bomb blast on 23rd St. in Manhattan's Chelsea neighborhood Getty Images In pictures: New York bomb explosion A mangled dumpster sits on the sidewalk at the site of an explosion that occurred in the Chelsea neighborhood of New York Getty Images In pictures: New York bomb explosion An explosion in a construction dumpster that injured 29 people is being labeled an "intentional act". A second device, a pressure cooker, was found four blocks away that an early investigation found was likely also a bomb Getty Images In pictures: New York bomb explosion New York Mayor Bill de Blasio (2-R) and New York Governor Andrew Cuomo (3-R) stand in front of a mangled dumpster while touring the site of an explosion that occurred in the Chelsea neighborhood of New York Getty Images In pictures: New York bomb explosion A member of the New York City Police Department K-9 Unit patrols on a subway train between Grand Central Terminal and Times Square Getty Images In pictures: New York bomb explosion FBI agents review the crime scene of remnants of bomb debris on 23rd St. in Manhattan's Chelsea neighborhood Getty Images In pictures: New York bomb explosion Members of the NYPD, FBI, ATF and other agencies investigate the the scene, following a late night explosion on West 23rd Street in New York AFP/Getty Images In pictures: New York bomb explosion Federal Bureau of Investigation (FBI) officials mark the ground near the site of an explosion in the Chelsea neighborhood REUTERS In pictures: New York bomb explosion New York Gov. Andrew Cuomo, right, walks from the scene of an explosion on West 23rd street in Manhattan AP In pictures: New York bomb explosion New York City Police Department (NYPD) officers stand near the site of an explosion REUTERS In pictures: New York bomb explosion Evidence markers on the street surround police and Federal Bureau of Investigation (FBI) officials near the site REUTERS In pictures: New York bomb explosion A fire truck is seen near a blocked off road near the site of an alleged bomb explosion on West 23rd Street AFP/Getty Images In pictures: New York bomb explosion New York City firefighters stand near the site of the explosion in the Chelsea neighborhood REUTERS In pictures: New York bomb explosion A New York City Police emergency services officer and his dog check a bin close to the scene EPA In pictures: New York bomb explosion New York City Police and Fire Department at the scene of the explosion EPA In pictures: New York bomb explosion A New York City firefighter uses a wheeled stretcher to carry supplies near the site of the explosion REUTERS In pictures: New York bomb explosion A New York City Police emergency service heavy weapons officer guards close to the scene of the explosion on 23rd Street between 6th and 7th Avenue EPA In pictures: New York bomb explosion New York Mayor Bill de Blasio, center, and NYPD Chief of Department James O'Neill, center right, speak during a press conference near the scene AP In pictures: New York bomb explosion New York City Police Emergency Services units are deployed on 27th Street and 7th Avenue where police found a second explosive device EPA In pictures: New York bomb explosion Police investigators look through the debris on the street in front of St. Vincent de Paul church where the explosion occurred EPA

"I think it's always wiser to wait until you have information before making conclusions."