The CEO of the Malta Freeport and his wife have been arrested in connection with a police investigation into possible money laundering and corruption, Times of Malta reports.

The investigation is reportedly linked with a multi-million euro contract that was awarded to construction magnate Charles Polidano some years back.

Polidano and his son were arrested and Friday and questioned by police. They were released on police bail on Saturday. Alex Montebello and his wife were arrested at the same time, the Times reports.

The police are said to be investigating how Polidano won the 2014 contract to carry out works at the Freeport, with Times of Malta saying that the company might have been overpaid for the project. They are also looking at how a property was transferred from Polidano to Montebello at a “suspiciously low price.”

At the time, Montebello was Chief Financial Officer at the Freeport.

 His lawyer, Arthur Azzopardi told the Times that “this investigation shall lead to the only one conclusion possible, that he [Montebello] is not guilty of any wrongdoing since he committed no wrongdoing.”

He added that his client was fully cooperating with the police and has provided all the documents requested by investigators.

Polidano’s company has also told the Times that it is assisting the authorities to verify the payments and has provided the necessary documentation.

Polidano was in the news recently after it emerged that his company had racked up over €30 million in unpaid taxes. He has recently made a €20 million payment as part of a settlement deal.