A second Canadian man has gone missing in China and is feared detained in what appears to be retaliation for Canada's arrest of a top executive of telecommunications giant Huawei, Canadian authorities said late Wednesday.

Canada's Global Affairs department identified its missing citizen as Michael Spavor, an entrepreneur who is one of the only Westerners to have ever met North Korean leader Kim Jong Un. Spavor's disappearance follows China's detention of a former Canadian diplomat in Beijing earlier this week.

"We have been unable to make contact (with Spavor) since he let us know he was being questioned by Chinese authorities," Global Affairs spokesman Guillaume Bérubé said. "We are working very hard to ascertain his whereabouts and we continue to raise this with the Chinese government."

Spavor is a fluent Korean speaker with longstanding ties to the North through his company, Paektu Cultural Exchange. He was instrumental in bringing NBA player Dennis Rodman to Pyongyang in 2013 and has organized a number of tours and joint cultural projects with the North since then.

Earlier Wednesday, Canadian Foreign Minister Chrystia Freeland said she was worried that another Canadian had been detained in China following Monday's arrest of former Canadian diplomat Michael Kovrig in Beijing.

At the root of the dispute is Canada's recent arrest of Meng Wanzhou, the chief financial officer of Chinese telecommunications giant Huawei, for possible extradition to the United States.

A Canadian court on Tuesday released Meng on bail, confining her to Vancouver and its suburbs while she awaits possible extradition to the United States. The U.S. accuses Huawei of using a Hong Kong shell company to do business with Iran in violation of U.S. sanctions.

The United States and China have taken pains this week to emphasize that their trade talks are entirely separate from the U.S. case against the top Chinese technology executive. But with a few words, President Donald Trump obliterated the distinction on Tuesday, saying he'd wade into the case if it would help produce a trade agreement with China.

"If I think it's good for what will be certainly the largest trade deal ever made — which is a very important thing — what's good for national security — I would certainly intervene if I thought it was necessary," Trump told Reuters in an interview.

The comment suggests Meng could be a political pawn in negotiations and makes things more awkward for Canada, which arrested her on America's behalf during a Dec. 1 layover at the Vancouver airport.

Canadian Prime Minister Justin Trudeau bristled at Trump's assertion, saying: "Regardless of what goes on in other countries, Canada is, and will always remain, a country of the rule of law."

Freeland said it was "quite obvious" any foreign country requesting extradition should ensure "the process is not politicized."

Canada has also asked China for extra security at its embassy because of protests and anti-Canadian sentiment and has advised foreign service staff to take precautions, a senior Canadian official told reporters.

Meng's arrest came the same day that Trump and Chinese President Xi Jinping agreed over dinner in Buenos Aires to a 90-day cease-fire in a trade war that has shaken global financial markets and raised worries about the impact on the world economy.

The truce was meant to buy time for more substantive talks over U.S. allegations that China steals U.S. technology and forces American companies to hand over trade secrets in exchange for access to the Chinese market.

U.S. officials have insisted the sanctions case against Meng had nothing to do with the ongoing trade talks. Top White House economic adviser Larry Kudlow told "Fox News Sunday" that "there's a trade lane ... and there is the law enforcement lane. They are different."

"Both Canadian and American officials have emphasized that the Meng arrest is separate from the trade talks," said Gregory Yaeger, special counsel at the Stroock law firm and a former Justice Department trial attorney.

"Trump's remarks could be interpreted as creating the appearance that the arrest also had political motivations. This could undermine the US's reputation as a country that follows the 'rule of law,' and could ultimately undermine both the Meng prosecution and the trade talks."

Still, there is precedent for Trump intervening on behalf of a Chinese company accused of violating U.S. sanctions.

Trump drew fire from Capitol Hill in June when he reached a deal that spared another Chinese telecommunications company, ZTE, from U.S. sanctions that probably would have put it out of business after it was accused of selling equipment to Iran and North Korea. U.S. regulators planned to bar it from receiving U.S. components that it depended on, effectively a corporate death sentence.

But Trump issued a reprieve, perhaps partly because U.S. tech companies, major suppliers to ZTE, would also have been scorched. ZTE agreed to pay a $1 billion fine, change its board and management, and let American regulators monitor its operations.

Speaking outside the White House Wednesday, Commerce Secretary Wilbur Ross urged reporters not to jump to the conclusion that Trump will actually intervene in Meng's case.

"Let's see what he actually decides," Ross said. "Let's see where we go from there."

Philip Levy, senior fellow at the Chicago Council on Global Affairs and an economic adviser in President George W. Bush's White House, noted that "there's a real value to keeping these things separate."

"Do we want China to seize an (American) executive when they want to get a concession on trade talks in the future?" he asked.