The U.S. government has imposed strict sanctions against doing business with the North Korean government. But Huawei, a giant telecom company at the center of a new Cold War between the U.S. and China, may have violated those sanctions by helping to build a 3G wireless network for North Korea, according to a new report from the Washington Post . Advertisement The Post cites three unnamed sources, including one former employee of Huawei, who all provided documents that show Huawei might have been working in North Korea with the country’s homegrown tech firm Koryolink. According to the Post, many of the details are still murky, but the documents, which sometimes include secret numerical codes instead of country names, raise questions about possible sanctions violations. Huawei is reportedly working with a company called Panda International Information Technology, which is owned by the Chinese government. Panda was blacklisted by the U.S. Commerce Department in 2014 and has no presence in the U.S., so technically it wouldn’t matter if it was in violation of American sanctions because it has nothing to lose. Huawei, on the other hand, does have a U.S. presence, which means that it can’t provide technology or services to North…