China summoned the U.S. ambassador to Beijing, Terry Branstad, on Sunday to dispute the arrest of Chinese electronics giant Huawei's chief financial officer, Meng Wanzhou.
The official Xinhua news agency said Vice Foreign Minister Le Yucheng "lodged solemn representations and strong protests" with Branstad over Meng's arrest. She is reportedly suspected of trying to evade U.S. trade curbs on Iran, and was detained on Dec. 1 in Vancouver, Canada.
On Saturday, Canadian Ambassador John McCallum was also summoned over Meng's detention and warned of "grave consequences" if the Huawei executive was not released.
Huawei is one of the largest mobile phone makers in the world and the company has come under pressure from Washington. It faces a restriction on selling telecoms equipment in the U.S. due to what American officials describe as national security concerns.
Beyond potentially influencing the technology space, the arrest may also have implications for the ongoing U.S.-China trade war.
Shares of companies associated to Huawei saw declines on Monday trade following the weekend's developments.
In Hong Kong, acoustic components supplier AAC Technologies slipped 0.69 percent while Chinasoft International, where Huawei is a strategic shareholder, fell more than 4 percent. Sunny Optical, which makes some of the lenses for Huawei phones, bucked the overall downward trend to rise 2.75 percent.
Over in Japan, conglomerate Softbank saw its stock decline by 3.51 percent ahead of the public listing of its mobile unit on Dec. 19. Last year, SoftBank and Huawei jointly demonstrated potential use of the next generation of high-speed mobile internet.