Third Canadian detained in China amid diplomatic tensions

A third Canadian national has been detained in China.... according to Canada's foreign ministry.The move threatens to escalate an already tense diplomatic feud between the two nations,..... which came after the arrest of a Chinese executive in Canada earlier his month.Since then..... two Canadians have been detained in China,.... but Ottawa officials say.... they don't believe the third arrest is linked to those arrests.Canadian Prime Minister Justin Trudeau expressed concern, saying the country is still collecting more information on the matter.Beijing's foreign ministry said.... it was unaware of the third arrest.