Switzerland has launched a complaint at the World Trade Organisation against US tariffs on steel and aluminium, it said on Tuesday, the eighth WTO member to start such a challenge.

"From Switzerland's point of view, the additional duties, which according to the US have been introduced to protect national security, are unjustified," the statement from the Swiss economy ministry said in a statement.

Under WTO rules, the United States has 60 days to settle the issue. After that time, Switzerland could escalate the dispute by asking the WTO to set up a panel of judges to adjudicate.

Sign up to our free newsletters

Get the best updates straight to your inbox:
Please select at least one mailing list.

You can unsubscribe at any time by clicking the link in the footer of our emails. We use Mailchimp as our marketing platform. By subscribing, you acknowledge that your information will be transferred to Mailchimp for processing.