An oil company chaired by a former leader of Britain's ruling Conservative party is being investigated for alleged corruption in Somalia, claims the company slammed as "defamatory".
Soma Oil and Gas, a private company chaired by Lord Michael Howard, on Monday denied paying more than half a billion dollars to government officials to protect an oil exploration deal signed in 2013.
Britain's Serious Fraud Office (SFO) said on Friday it had opened a criminal investigation into Soma following allegations of corruption in Somalia.
The allegations stem from investigations carried out by the United Nations Monitoring Group on Somalia and Eritrea, set up to detail infringements of arms embargoes on the countries.
The investigators say that $690,000 (630,000 euros) worth of payments were suspicious. They allege that at least $580,000 paid since June 2014 as part of a "capacity building programme" may have been corrupt payments to Somali government officials.
An April 2014 "side letter" from Soma to Somalia's petroleum minister said the company would pay salaries and equipment costs to support the exploration programme up to a total of $400,000. The agreement was extended in April 2015, since when a further $90,000 has allegedly been paid.
A further $100,000 was paid for a "data room" to store and analyse seismic data but which has not been built.
The allegations were contained in a 28-page report put to the UN Security Council's sanctions committee on Monday.
Soma said in a statement that the UN investigators had "fundamentally misunderstood the nature, purpose and destination of the payments made".
"Any suggestion that any of the payments... were improper, unlawful or gave rise to a conflict of interest is incorrect and defamatory," the company said.
"Soma has always conducted its business in a completely lawful and ethical manner and will take all appropriate steps to protect its reputation."
The Soma deal is intended to revive Somalia's oil and gas industry which has been on hold during decades of civil war and years of Islamic insurgency.
Howard is expected to be interviewed by the SFO as part of its investigation. Soma said "no suspicion whatsoever attatches to Lord Howard".