Building company Strukton is being investigated for paying millions of euros via an agent to a half brother of the current Saudi king, the Financieele Dagblad said on Friday.

The FD says the payments to prince Mishaal bin Abudalaziz al Sauid via a middle man enabled Strukton to work on developing a metro network in Riyadh, the capital of Saudi Arabia. The prince has since died.

The paper bases its claims on information received following a raid on Strukton’s headquarters in Utrecht on February 15.

Strukton chairman Gerard Sanderink said in a reaction that there is no question of bribery being involved. ‘The project was awarded on the basis of the lowest price,’ he said.

‘We have been told that the FIOD based the decision for the raid on audits by the tax authorities, leading to suspicion of corruption and false declarations when obtaining a contract for the metro project in Riyadh. We fully cooperate and provide full insight to the FIOD,’ the company statement said.

Strukton is one of several companies involved in the multi-billion euro project to build six metro lines in Riyadh that will run for a total length of 176 kilometres across the city and includes 85 stations.