VANCOUVER, British Columbia — The reasons that the United States asked the Canadian authorities to arrest a top executive of the Chinese technology company Huawei last week had been shrouded in mystery.

On Friday, the details of the arrest and what led up to it came out in a Canadian courtroom.

At a bail hearing in Vancouver for Meng Wanzhou, the chief financial officer of Huawei and a daughter of the company’s founder, Canadian prosecutors said she was accused of fraud. The heart of the charges related to how Ms. Meng may have participated in a scheme to trick financial institutions into making transactions that violated United States sanctions against Iran, they said.

Källa: Huawei Executive Took Part in Sanctions Fraud, Prosecutors Say