Authorities are investigating a Tesla Cybertruck explosion on Wednesday outside the Trump Las Vegas hotel in Nevada as a possible act of terror, law enforcement officials said.

Sheriff Kevin McMahill of the Las Vegas Metropolitan Police Department told reporters that investigators were looking into any possible connections to the deadly attack in New Orleans earlier Wednesday but had not yet discovered any.

A driver rammed a vehicle into a crowd of New Orleans revelers early on New Year’s Day, killing 10 people and injuring 35 others in what the FBI is investigating as an act of terrorism.

The driver was killed in a firefight with police following the attack around 3:15 a.m. Wednesday along Bourbon Street in the city’s bustling French Quarter, the FBI said.

Guantanamo Bay inmate Ridah Bin Saleh al-Yazidi has been repatriated to Tunisia, the US Department of Defense says.

He was found eligible for transfer from the detention facility after a "rigorous interagency review process", a press statement said.

A prisoner who has been held at Guantanamo Bay since the day it opened over 20 years ago has been released, the Pentagon said.

Ridah bin Saleh al-Yazidi’s transfer back to Tunisia was approved more than a decade ago, and he was never charged, but authorities have only just confirmed his repatriation.

The Pentagon on Monday returned to Tunisia a detainee held at the United States' military base at Guantanamo Bay, in Cuba, since 2002. 

The Defense Department said Ridah Bin Saleh al-Yazidi, 59, was repatriated to the government of Tunisia after he was "determined transfer-eligible by a rigorous interagency review process established by [a] 2009 Executive Order."

Police have arrested a 50-year-old man after a car ploughed into a busy outdoor Christmas market in Magdeburg on Friday evening, killing at least five people and injuring 200 others.

At least five people - including a nine-year-old boy and four women - were killed in the attack as the suspect is remanded in custody.

German law enforcement officials were repeatedly warned by Saudi Arabia that a man who drove into 200+ people at a Christmas event in Germany on Friday night was dangerous — warnings that Germany’s leftist government ignored.

CNN reported that the chief of the Magdeburg Public Prosecutor’s office, Horst Walter Nopens, said that 50-year-old doctor Taleb al-Abdulmohsen may have been “disgruntlement with the way Saudi Arabian refugees are treated in Germany.”

The Saudi authorities, I am told, are currently working flat out to collate everything they have on the Magdeburg market suspect, Taleb al-Abdulmohsen, and to share it with Germany's ongoing investigation "in every way possible".

Inside the imposing sand coloured and fortress-like walls of the Saudi Ministry of Foreign Affairs in Riyadh there is a perhaps justifiable sense of pique.

Its glühwein stalls, festooned with Christmas lights and tinsel, stand emptied and shuttered.

On the cordoned off market street, in the center of Magdeburg, German police stand guard as, one officer told CNN, forensic teams carefully examine the crime scene before scrubbing the blood stains from the road.

The horrific car-ramming attack on this Christmas market on Friday night left at least five people dead, including a 9-year-old boy, plunging this provincial German city into shock.