FILE PHOTO: Christine Lagarde, managing director of the International Monetary Fund, attends a session of the St. Petersburg International Economic Forum (SPIEF), Russia May 24, 2018. Vladimir Smirnov/TASS/Host Photo Agency/Pool via REUTERS

ST. PETERSBURG, Russia (Reuters) - International Monetary Fund Managing Director Christine Lagarde said on Friday that U.S. complaints about the size of its trade deficit with China were strange.

Speaking in St. Petersburg at an economic forum, Lagarde also said that U.S. complaints about alleged Chinese intellectual property violations should be discussed at the World Trade Organization.