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24 April 2015, 05:18 | Updated: 24 April 2015, 08:06
Police have offered a £20,000 reward for information leading to the arrest and conviction of all those involved in the Hatton Garden safety deposit burglary.
Detectives released for the first time an image of the Hilti DD350 drill that was used during the burglary.
The power tool was used by a gang of six men captured on CCTV carrying out the audacious raid over the Easter Bank Holiday weekend.
Detective Superintendent Craig Turner, head of the Flying Squad, said that the theft had been carried out by an "almost Ocean's 11 type team".
Mr Turner said: "This was a particularly ambitious burglary to say the least and has affected so many victims.
"People's property has been taken, people's pensions, people's heirlooms which obviously can't be replaced by insurance firms.
"We may well be misled - this is carried out by an almost Ocean's 11 type team, but in essence there are victims behind this and these are callous thieves."
Mr Turner appealed for members of the public who may have been in the Hatton Garden area during the theft and who may have seen anything suspicious to come forward.
There are still six victims who have not been identified yet by police, Mr Turner said.
"I appeal to any of those victims who haven't been contacted by police to contact the incident room," he added.
The extraordinary raid was executed at the Hatton Garden Safe Deposit Company over four days between Thursday April 2 and Sunday April 5.
It was only discovered when staff returned on Tuesday April 7 following the long Bank Holiday break.
Officers believe the gang entered the building, which houses a number of businesses, through a communal entrance before disabling the lift so they could climb down the lift shaft to the basement.
They forced open shutter doors and bored a hole 20in (50cm) deep, 10in (25cm) high, and 18in (45cm) into the vault wall where they then had free access to the safety deposit boxes.
A total of 72 boxes were opened during the burglary, with reports that the contents may have been worth as much as £60 million.