https://www.cnbc.com/2018/12/06/us-probe-into-huawei-includes-accusations-of-bank-fraud-and-sanctions-violations-reuters.html

Chinese telecoms giant Huawei's chief financial officer was arrested as part of a U.S. investigation into an alleged scheme to use the global banking system to evade U.S. sanctions against Iran, according to sources familiar with the situation.

The United States has been looking into whether Huawei Technologies Ltd violated U.S. sanctions against Iran since at least 2016 and more recently the company's use of HSBC Holdings Plc to make illegal transactions involving Iran.