President Donald Trump will announce tariffs on Chinese imports on Thursday, a White House official said, in a move aimed at curbing theft of U.S. technology and likely to trigger retaliation from Beijing and stoke fears of a global trade war.

There was no indication of the size and scope of the tariffs, which U.S. Trade Representative Robert Lighthizer said on Wednesday would target China’s high-technology sector and could also include restrictions on Chinese investments in the United States. Other sectors like apparel could also be hit.

“Tomorrow the president will announce the actions he has decided to take based on USTR’s 301 investigation into China’s state-led, market-distorting efforts to force, pressure, and steal U.S. technologies and intellectual property,” the official said.

The White House said Trump would sign a presidential memorandum “targeting China’s economic aggression” at 12:30 p.m. (1630 GMT) on Thursday.

The investigation by the United States under Section 301 of the 1974 Trade Act has identified theft from and coercion of U.S. companies to disclose their intellectual property as well as purchases by Chinese state funds of U.S. companies for their technology knowledge.

Lighthizer told the House of Representatives Ways and Means Committee, a top economic panel, that the aim would be to minimize the impact of any tariffs on U.S. consumers.