Danish shipping firm Maersk Line has suspended operations at three Iranian ports to comply with enhanced US sanctions.

Maersk line, a unit of AP Moller-Maersk Group, manages a number of refrigerated ships and container vessels that transport food and goods to the country.

“We have a comprehensive compliance programme in place and continue to take all actions necessary to comply with all US and EU trade regulations. In this connection, Maersk Line has decided to cease acceptance of business to and from the Iranian ports of Bandar Abbas, Bandar Khomeini and Assaluyeh,” says Morten Engelstoft, chief operating officer for Maersk Line in a statement on 30 June.

Under the sanctions, US entities are forbidden to make any transactions with Tidewater Middle East Company, Iran’s largest container port operator, which the US alleges is a front company for the Iranian Revolutionary Guards Corps.

Maersk has not specified how much cargo will be affected by the closure of its operations. The port of Bushehr is not covered by the sanctions.