Houston oilfield services company, Nabors Industries, became the latest oilfield services firm to launch an internal review in response to a federal investigation into possible violations of the Foreign Corrupt Practices Act (FCPA).

In a filing with the SEC, Nabors said, “We are reviewing certain transactions with this vendor, which provides freight forwarding and customs clearance services, and intend to cooperate with the Department of Justice inquiry. The ultimate outcome of this review cannot be determined at this time.”

Nabors is the the world’s largest land driller. You can read additional coverage by the Houston Chronicle here.