He said Beijing security and state security officials in the city of Dandong, Liaoning Province had taken measures against Spavor and Kovrig.
Kovrig had been reported as missing earlier this week.
Canadian leaders say they are deeply concerned about the detention of a Canadian citizen in China.
Lu said China provided "relevant information" to the Canadian consulate "without delay".
Meng can appeal both a committal order and a surrender order and in such a case, the two appeals might be heard at the same time by the B.C. Court of Appeal. Experts say the men are likely facing harsh conditions and are under significant pressure to confess to the allegations against them.
Supporters hold signs and Chinese flags outside B.C. Supreme Court during the third day of a bail hearing for Meng Wanzhou, the chief financial officer of Huawei Technologies, in Vancouver, on Tuesday December 11, 2018.
Meng's arrest was made at Washington's request.
American authorities are seeking extradition so Meng can face fraud allegations related to alleged violations of worldwide sanctions against Iran.
A second Canadian citizen who has been questioned by authorities in China is "presently missing", Canadian officials said Thursday, adding to tensions following the arrest of a top Chinese telecom executive on a U.S. request in Vancouver.
Meng was released on a $7.5-million bail by a court in Vancouver on Tuesday pending a U.S. extradition hearing.
Foreign Affairs Minister Chrystia Freeland's office said the department takes "any situation of a Canadian under duress overseas extremely seriously".
Canadian officials arrested Meng after the United States released a warrant for her arrest.
Kieran Read won't re-sign to NZ Rugby after 2019
Hansen says he wants to make the announcement about his future now so that New Zealand Rugby had plenty of time to identify a successor.
The root of the dispute appears to be Canada's arrest of Meng while she was changing planes at Vancouver airport.
Canada has been unable to contact Spavor since he notified the government that he was being questioned by Chinese authorities, Foreign Ministry spokesman Guillaume Bérubé said in statement issued in Canada. "We are working very hard to ascertain his whereabouts and we continue to raise this with the Chinese government".
One of his most recent Facebook posts, on Sunday, said he was about to travel to Seoul in South Korea but he did not arrive on Monday as planned.
A native of Alberta, Spavor studied worldwide relations at the University of Calgary and then in South Korea, according to a biography posted to the Paektu website.
Kovrig is an analyst on northeast Asia for the International Crisis Group, a think tank, who took a leave of absence from the Canadian government and is based in Hong Kong.
Spavor, who is based in Dandong, is the head of Paektu Cultural Exchange, a China- and UK-based non-profit social enterprise.
On Thursday the minister still had plans to attend, but on Friday, her spokesperson said Canada and China mutually agreed to postpone the ceremony.
Spavor runs tours of North Korea along with other "cultural exchanges" and "business projects" via his company Paektu Cultural Exchange.
One Western diplomat in China told Reuters news agency: "This is a political kidnapping".
Another option for the daughter of the Chinese billionaire founder of Huawei is to waive any legal challenges in Canada, hire the best lawyers she can find in the USA and fight the case in the U.S.
"He is a very gregarious, affable guy and Korea watchers know him and like him". He spent more than 20 years working in the Korean Peninsula, and first visited North Korea in 2001, it said. "I'm not sure what he could have done to get in this sort of situation".
The Global Times said there was no evidence Kovrig's arrest was in any way connected to the case, but added, "the assumption is because Canada has gone too far and people naturally believe China will retaliate".