Delegates arrive at the World Trade Organization (WTO) headquarters in Geneva, Switzerland November 22, 2017. REUTERS/Denis Balibouse

WASHINGTON (Reuters) - The Unites States is expected to sue China at the World Trade Organization over alleged trade law violations as part of its planned trade announcement later on Thursday, the Wall Street Journal reported, citing a person with knowledge of the plans.

Planned U.S. tariffs on China could also hit $50 billion of Chinese imports, the Journal said, citing the individual.