Poland said Friday it had arrested a Chinese telecoms executive suspected of spying for China, with local media identifying him as a Huawei director.

The United States is demanding the immediate return of a retired US Marine detained by Russia on spying charges, and wants an explanation of why he was arrested, US Secretary of State Mike Pompeo said on Wednesday.

Kevin Garratt, a Canadian held in China for two years and charged with spying, returned to Canada on Thursday in what was a diplomatic triumph for Prime Minister Justin Trudeau.