The minister's special adviser Segun Adeyemi told Reuters: "All these are monies recovered from individuals and entities who had either hidden, stolen, diverted or were in possession of monies belonging to the nation.

"These recovered funds include monies withheld by past government officials, monies kept in private accounts, monies diverted to private pockets and monies in possession of government officials not disclosed after leaving government."

Nigeria also expects the return of some $330m stolen from its public treasury and moved to overseas banks, most of it in Switzerland, according to Mr Mohammed.

He did not name any officials, but the government has previously promised to publish their names.

Last month, British Prime Minister David Cameron was recorded describing Nigeria and Afghanistan as "fantastically corrupt" in a conversation with the Queen.

Nigeria's president Muhammadu Buhari told Sky News in response that his country is corrupt and that he did not expect an apology from the PM.

Speaking in London at an anti-corruption event hosted by the Commonwealth Secretariat, Mr Buhari said: "What would I do with an apology?"

Hundreds of people have reportedly been arrested on suspicion of corruption offences in Nigeria during the past year.

Current trials include that of retired Colonel Sambo Dasuki, national security advisor to former president Goodluck Jonathan.

He is accused of diverting $2.1bn in funds intended to fight Boko Haram insurgents.

Dasuki's financial director Shuaibu Salisu has told the court that $47m in cash was put into 11 suitcases and taken from the country's central bank to his home.

But Dasuki says Mr Jonathan had told him the money should be used to bribe party officials to help him win his party's presidential nomination.

Jonathan lost the election in 2015 to current leader Mr Buhari, who says he inherited national finances severely depleted by massive corruption.

Since then, the sharp drop in oil prices - crude sales make up around 70% of national income - has left the country struggling economically.

The government has previously revealed plans to generate $17bn this year from non-oil sources to help fund the $30.6bn budget signed into law by Mr Buhari last month.

The body was discovered shortly after 7pm on Friday in woodland in Weybread in Suffolk, close to where he shared a home with his wife Sylvia Stuart, who is also missing.

Although formal identification has not taken place, Suffolk Police say they think the body is that of Mr Stuart, who has not been seen since 28 May.

Detective Chief Superintendent Simon Parkes said: "We are treating this as a murder inquiry and as a missing person investigation as we continue to search for Sylvia.

"We are currently carrying out a number of inquiries to find out exactly what has happened and would continue to ask anyone with information to come forward."

The couple were reported missing at around 7.15am on Friday after checks with friends, neighbours and hospitals failed to find them.

Police launched a search after their car was found at their home in Mill Lane.

Officers are continuing to comb the area in an effort to find Ms Stuart, 69, and family liaison officers are supporting the couple's family.

Mr Parkes added: "We are particularly keen to speak to anyone who may have seen anything suspicious in this area of Weybread between Saturday May 28 and today and would ask anyone who can help to call us."

Police are asking anyone who may be able to help to call 01473 782000 or 101, quoting CAD number 49 of Friday 3 June.

The Remain campaign have placed the economy at the centre of their messaging, highlighting the risks of giving up our EU membership.

Speaking on Sky News' EU debate this week, the Prime Minister claimed leaving would be an "act of economic self-harm".

Chancellor George Osborne has also warned Brexit could leave British families £4,300 worse off per year, while leading economic figures including International Monetary Fund chief Christine Lagarde and Bank of England boss Mark Carney have highlighted the risks of financial instability if Britain quits the EU.

Despite this, one in five Britons (20%) have said the economy was the area about which they felt least informed in the EU referendum campaign.

Britons are least likely to feel ignorant about the impact on immigration - a key area for the Leave campaign. Only 7% said they know least about immigration.

People feel least informed about sovereignty (22%), while one in seven know least about security (14%). Four in ten considered themselves well-informed in all of these areas (37%).

Older people generally felt better informed about the referendum (40% of over 55s felt well-informed compared with 30% of 18-34s), though they were less sure about the impact on security than younger people (17% vs 11%), while younger people were less aware of the issues around sovereignty (30% for 18-34s compared with 14% of over-55s).

The Sky Data Snap Poll also suggested Britons are increasingly making up their minds in the EU debate.

In an online poll in April, Sky Data showed 29% said they might still change their mind on which way to vote, while today's poll by SMS shows just 14% now say the same.

The findings come as David Cameron accused his Conservative colleagues Michael Gove and Boris Johnson of "writing cheques they know will bounce" after they claimed an extra £100m a week would be available to spend on the NHS if Britain left the EU.

The Justice Secretary and former London mayor have said they would be able to use the UK's contribution to Brussels to give the health service a "cash transfusion".

However, the Prime Minister argued the economic damage caused by Brexit would mean there would be less money for the NHS.

The criticism follows Mr Gove's appearance on Sky News in which he attacked the PM's arguments for remaining in the EU as "depressing" and "an exercise in trying to scare you".

But he also failed to guarantee jobs would not be lost if the UK left the EU and was accused of acting like a World War One general, in urging men over the top without any idea of what was on the other side.

Meanwhile, six former Labour leaders have called on the party's supporters to vote to stay in the 28-member bloc on 23 June.

In an open letter released by Britain Stronger in Europe, Lord (Neil) Kinnock, Dame Margaret Beckett, Tony Blair, Gordon Brown, Harriet Harman and Ed Miliband warned: "If Labour stays at home, Britain leaves."

There are concerns that a low turn-out by party supporters could see the Leave campaign win.

Lord Kinnock urged young voters to ignore the "fantasy" claims being made by the "quitters", arguing the promises were "pants".