Hackers launched a cyber attack on Canada's foreign ministry last week and some services are still down, officials said on Monday without disclosing who Ottawa thought was responsible.
The incident was detected last Wednesday, a day before Canada's signals intelligence agency said network operators of critical infrastructure should boost their defenses against Russian state-sponsored threats.
"Critical services ... are currently functioning. Some access to internet and internet-based services are currently not working," said a statement from the Treasury Board, which has overall responsibility for government operations.
"There is no indication that any other government departments have been impacted," it said, adding no more details would be released.
Neither the Treasury Board nor the foreign ministry responded when asked whether Russian actors were responsible.
Canada has taken a strong line against Russia's military build-up on the Ukrainian border strong line against Russia's military build-up on the Ukrainian border.
Ottawa rarely speaks about hacks into its systems. In 2011, officials said "a highly sophisticated Chinese state-sponsored actor" had broken into a leading research body. Beijing denied it.
In 2014, a former Canadian cabinet minister said Chinese operators were suspected of hacking into the Treasury Board and the finance ministry in 2011.
Nigerian Man Visits 150 Fast Food Restaurants In 24 Hours To Set World Record World Organ Donation Day 2024: Answer To Common Questions About Organ Donation From Expert India Committed To Ensure Conducive Habitat For Elephants: PM Modi Parents Gave Names Of Interns, Doctors To CBI In Kolkata Horror: Sources How Extreme Weather Is Leading To Rise In Child Marriages In Pakistan Who Is Jasveen Sangha, "Ketamine Queen" Charged With Matthew Perry's Death Two Sisters Returning From Court Run Over By Car In UP: Cops India Sends 1,400 kg Anti-Cancer Drugs To Syria In Humanitarian Assistance Police Arrest Suspect In Bihar Dalit Girl Kidnapping, Murder Case Track Latest News Live on NDTV.com and get news updates from India and around the world.