Chinese state media is reporting that Chinese tax authorities recently executed searches of the facilities of Foxconn, a supplier most well known for its manufacture of iPhones, and a member of the Fortune 500.

Officially registered as Hon Hai Precision Industry Co., Ltd and headquartered in Taiwan, Foxconn saw tax officials conduct searches of its offices in Guangdong and Jiangsu provinces, according to reports in the Global Times newspaper, a Chinese state-run outlet.

The Ministry of Natural Resources also conducted searches at Foxconn’s Henan and Hubei province offices, where the company maintains major factories. Across China, Foxconn has hundreds of thousands of employees.

The report did not contain any other detail, such as what motivated the searches, what they found, or even when exactly they occurred.

However an expert quoted in the report noted that, “while Taiwan-funded enterprises, including Foxconn, are sharing in dividends from development and making remarkable progress in the mainland, they should also assume corresponding social responsibilities and play a positive role in promoting the peaceful development of cross-strait relations.”

China and Taiwan have seen tensions elevate lately. China claims the self-governing island is a part of greater China. However the island split away in 1949 following a civil war. Though the two share no official relations, they are linked by billions in trade and investment.

More recently China has conducted a series of military exercises, and flybys with fighter jets to emphasize it feels the island must reunify with the mainland, if necessary by force.

Although based in Taiwan, the majority of the manufacturing Foxconn does occurs in China.

In August, Terry Gou, the founder of the company, announced his candidacy in the Taiwanese presidential elections, which will be held in early 2024. Following his announcement, he resigned from the board of Foxconn. As a candidate, Gou is seen as more sympathetic to the Chinese position, with political views which align more closely with the Kuomingtang, the island’s current opposition party.