The European Union is preparing further countermeasures against U.S. tariffs if negotiations fail, according to European Commission president Ursula von der Leyen.

U.S. President Donald Trump had imposed 20% tariffs on the bloc on Wednesday.

Von der Leyen’s comments come after retaliatory duties were announced by the bloc after the U.S. imposed tariffs on  last month in a bid to protect European workers and consumers. The EU at the time said it would introduce counter-tariffs on 26 billion euros ($28 billion) worth of U.S. goods.

Previously suspended duties — which were at least partially in place during Trump’s first term as president — are set to be re-introduced alongside a slew of additional duties on further goods.

Industrial-grade steel and aluminum, other steel and aluminum semi-finished and finished products, along with their derivative commercial products, such as machinery parts and knitting needles were set to be included. A range of other products such as bourbon, agricultural products, leather goods, home appliances and more were also on the EU’s list.

Following a postponement, these tariffs are expected to come into effect around the middle of April.

This is a developing story, please check back for updates.