Police are continuing to investigate after two men reportedly used a shotgun to threaten a security guard outside the Grosvenor Casino in Newcastle.
The pair stole a large sum of money and fled the scene.
The incident happened at around 3.50pm on Thursday February 21 outside the casino on Saint James Boulevard.
The men escaped in a while 4x4 which was discovered on fire a short time later in Gateshead.
The vehicle was an Audi Q5, registration NL61 UDX, that was stolen in Bedlington on 19th February.
Both men were said to have had their faces covered with ski masks that were either dark blue or black. One was taller than the other and one spoke with a local accent.
Anyone with information should contact Northumbria Police or Crimestoppers on 0800 555 111
"While no-one was assaulted or injured during the incident it was obviously distressing for the guard and we are doing all we can to trace the two men involved. "One focus of our enquiries is the white Audi Q5 vehicle, and we are keen to hear from anyone who has seen this since it was stolen on Tuesday, including the lead up to the robbery taking place on Thursday afternoon. "We believe the offenders then left the area where the vehicle was burnt out in a second vehicle."
More top news
The threat level has been raised to critical by MI5's Counter-Terrorism Analysis Centre.
Prime Minister Theresa May announced the decision from Downing Street.
Newcastle Central Mosque is welcoming Muslims and non-Muslims alike this evening to stand in solidarity with the people of Manchester.