The mysterious arrest of an Australian man in the world's most secretive state has sent ripples through his home country.
The family of Alek Sigley, who lives in North Korea's capital Pyongyang, said they had not heard from the 29-year-old since Tuesday.
It is not known why Mr Sigley, a fluent Korean speaker who is studying for a masters in Korean literature at Kim Il-sung University, might have been taken in by the authorities.
On Thursday his parents said they had no proof he had been detained but that it was unusual for him not to be in digital contact with his friends and family for such a long period of time.
The Australian government has described the situation as a "very serious set of circumstances".
If the family's fears prove to be true, Mr Sigley will be one in a long line of westerners who have ended up on the wrong side of North Korean law.
In 2016 American college student Otto Warmbier was sentenced to 15 years of hard labour for stealing a propaganda poster.
The tiny transgression would cost Mr Warmbier's life.
He died shortly after the authoritarian country released him in a vegetative state in 2017.
In May 2014 American Jeffrey Fowle was locked up for deliberately leaving a Bible in a restaurant toilet.
The Ohio resident was let out several months later after Sweden helped the US negotiate his release.
According to the UK Foreign Office, four US and one Canadian citizen have been arrested in North Korea in recent years, with a Japanese national being detained for a month on unspecified grounds in 2018.
In the light of the government office's advice not to insult or joke about the Communist run country or to show non-straight sexual tendencies in front of officials, Mirror Online has compiled a run down of the strangest offences that can get you arrested in North Korea.
Making international calls
The vast majority of North Korean citizens have no contact with the world beyond their country's borders - something the government is keen to continue.
Those wanting to chat to people outside of North Korea can't rely on the heavily restricted national mobile network and must instead get hold of a phone smuggled in from China.
While citizens living close to the border with China can pick up its networks, the price of doing so can be incredibly high.
If you're caught with a illegal international phone you can be sent to a reform facility or prison camp.
The country does have its own mobile phone offering - the recently released Pyongyang 2425.
Made in China, it is powered by a eight-core processor and has facial recognition.
Sadly for early adopters it can't be connected to foreign wifi and photos preloaded on the phone can't be opened.
Listening to the wrong song
The Korean Workers’ Party Propaganda and Agitation Department is determined that citizens subsist on a very carefully curated cultural diet.
In 2015 officials were sent door-to-door to collect cassettes and CDs containing prohibited content from people's homes.
If a banned tune was uncovered, the whole selection of music were incinerated.
Not car pooling
The country's road network is in a shoddy state.
Only 7.5% of the country's roads are paved, with large potholes a regular feature on the parts that are.
According to exile Kim Ji-ho, it is forbidden to drive without passengers in your car unless you have a special permit.
Sporting a mohawk
While tourists are mercifully free from this particular piece of legislation, North Koreans can only choose from a selection of haircuts.
"Non-socialist" trims were warned against in workshops ahead of the country's 70th anniversary in 2018.
Men and woman can choose between 15 state-approved cuts, according to illustrated guides spotted in Pyongyang's hair salons.
Along with short skirts and dyed hair, having the wrong barnet can lead to a small fine or short-term imprisonment.
Going on holiday
Movement is far from free in North Korea.
Only the highest ranking officials are allowed to own or lease vehicles and access to fuel is incredibly limited.
Travelling outside of the country is completely off the cards.
Those who are caught trying to flee to China are routinely beaten and sent to concentration camps.
People who come into contact with non-government organisations associated with South Korea or religions are executed.
Watching porn
Unsurprisingly, the production, distribution and importation of pornography is illegal in North Korea, punishable by up to two years hard labour.
That hasn't stopped the country's citizens however.
After the elites started indulging in saucy material in the 1990s, porn slowly spread to the wider population.
Today smut is sold fairly openly on the border with China, with low quality bootlegs from the latter country the easiest to get hold of.
Locally produced porn typically depicts nude or scantily clad women dancing to music.
Wearing jeans
Despite the recent cosying up of "Rocket Man" Kim Jong-Un and former steak salesman Donald Trump, North Korea is not particularly keen on American culture.
The animosity between the two countries stretches back to the 1950s, when the US flattened almost all of the Asian state's infrastructure and killed as many as 1.5 million civilians in a brutal carpet bombing campaign.
The atrocity understandably left a bad taste in the mouth and led to a suspicion of Western culture.
As a consequence denim jeans - viewed as an archetypally American piece of clothing - are strictly forbidden.
A travel guide
Given that foreigners who find their way into North Korea will almost certainly be on a tightly controlled tour, a Lonely Planet Guide to the Democratic Republic wouldn't be that must use anyway.
Regardless, travel guides, political material and religious items are all banned in a bid to stop outside cultures eking into North Korean life.
Laptops, tablets and cameras are allowed into the country, although they are closely watched by state officials.
Taking a quick snap of the wrong landmark can also see you locked up for espionage.
