Detectives hunting an organised gang responsible for Britain's biggest ever robbery have arrested two people.
A man (29), and a woman (31), were held in the London area by Kent Police's serious and major crime squad.
The two are at undisclosed police stations in the Kent area and are being questioned on suspicion of conspiracy to commit robbery.
A 100-strong police team is engaged in the hunt for the gang of at least six "callous" armed robbers who stole up to £50 million from the Securitas depot in Tonbridge, Kent.
A reward of up to £2 million has been offered for information leading to the recovery of the money and the conviction of gang members, police said
Detectives are studying CCTV footage from the Securitas depot, and police are forensically examining the site. Earlier, police put out an alert to all ports, warning that the gang behind Britain's biggest robbery was armed and dangerous. Staff at airports have also been put on alert to prevent the criminals leaving the country with their haul.
The Governor of the Bank of England has called for a review of security arrangements for the storage of banknotes following the raid.
Police forensic officers at work at the Securitas depot in Tonbridge.
The Bank of England said at least £25 million had been stolen from a security depot yesterday morning, but sources said the true figure could be as high as £50 million.
The armed gang must have had inside information, crime experts said today. They believe the gang must have known where the money was, and the easiest way to get in and out.
The raid happened at about 2.15am yesterday when 15 employees were threatened and tied up. The gang, posing as police, abducted the depot manager, his wife and son, and threatened him at gunpoint, forcing him to co-operate.
Police said the heist began when the manager of Securitas's main cash depot south of the Thames was pulled over while driving near Stockbury, Maidstone, at 6.30pm on Tuesday by what he believed was an unmarked police car.
A man wearing a high-visibility jacket and "police-style" hat got out of the vehicle, which had blue lights in the radiator grille, and spoke to him.
Thinking they were genuine police officers, the manager got into their car where they handcuffed him.
Two more fake policemen visited the manager's wife and young son, told them the manager had been involved in an accident, and took them from their home, officers said.
The manager was tied up and put inside and taken to an unknown location where he was threatened at gunpoint and told to "cooperate or his family would be at risk", a police spokesman said.
At about 1am he was taken to the security depot where at least six men, some masked and armed with handguns, threatened and tied up the staff.
The gang loaded the cash into a white lorry before driving off at about 2.15am yesterday. Police were alerted about an hour later when the shocked but uninjured staff activated an alarm. The manager, his wife and son - who had been taken to an undisclosed location - were also unhurt.
PA