FILE PHOTO: Containers and cargo vessels are seen at sunset at a port in Lianyungang, Jiangsu province, China March 12, 2019. REUTERS/Stringer/File Photo

WASHINGTON (Reuters) - The U.S. Commerce Department said on Monday it banned six Chinese technology entities, one Pakistani firm and five based in the United Arab Emirates from exporting sensitive U.S. technologies and other goods.

In a statement, the Commerce Department said four of the Chinese firms, also with offices in Hong Kong, attempted to procure U.S.-origin commodities that would have supported Iran’s weapons of mass destruction and military programs in violation of U.S. export controls.

The Commerce Department said two other Chinese firms were added to the banned “Entities List” because they participated in the export of controlled technology, which was then supplied to organizations affiliated with the People’s Liberation Army.

The export bans come as the United States and China have escalated their trade war following difficult negotiations last week. The United States has increased tariffs on $200 billion worth of Chinese goods to 25 percent from 10 percent, while China has raised tariffs on a target list of $60 billion in U.S. imports

The banned Chinese entities are Avin Electronics Technology Co Ltd, based in Shenzhen; Longkui Qu of Linhai, Zhejiang province; Multi-Mart Electronics Technology Co of Nanhai, Guangdong province; Taizhou CBM-Future New Material Science and Technology Co Ltd of Linhai, Zhejiang province; Tenco Technology Co Ltd, Shenzhen; and Yutron Technology Co Ltd of Shenzhen.

Avin, Mult-Mart, Tenco and Yutron all have offices in Hong Kong, Commerce said.

“We are putting individuals, businesses, and organizations across the world on notice that they will be held accountable for supporting Iran’s WMD activities and other illicit schemes,” Commerce Secretary Wilbur Ross said in a statement. “Moreover, we cannot allow China’s civil-military integration strategy to undermine U.S. national security through prohibited technology transfer plots orchestrated by state actors.”