WASHINGTON (AP) — The Justice Department has added new criminal charges against Chinese tech giant Huawei and several subsidiaries, accusing the company in a brazen scheme to steal trade secrets from competitors in America, federal prosecutors announced Thursday.

The company also provided surveillance equipment to Iran that enabled the monitoring of protesters during 2009 anti-government demonstrations in Tehran, according to the indictment, and also sought to conceal business that it was doing in North Korea despite economic sanctions there.

The company issued a statement Thursday evening dis...