Hyperdynamics said on 30 September the US Department of Justice had issued a subpoena asking it to produce documents relating to its business in Guinea. “The company understands that the DoJ is investigating whether Hyperdynamics’ activities in obtaining and retaining the concession rights and its relationships with charitable organisations potentially violate the US Foreign Corrupt Practices Act or US anti-money laundering statutes,” Hyperdynamics said. Guinea’s resource contracts have been under scrutiny since President Alpha Condé took office in December 2011, and US investigators are taking the lead in another high-profile case.