Nippon Steel and US Steel say they have jointly filed a lawsuit against the US government in response to US President Joe Biden blocking the Japanese company's takeover bid of US Steel.

The companies have asked the US court to set aside the review process by the Committee on Foreign Investment in the United States, or CFIUS, and Biden's blocking order.

They say the interference violates Constitutional guarantee of due process and other procedural requirements. They also claim there was unlawful political influence.