The family of an Australian man detained in North Korea has gone another day without news, while Prime Minister Tony Abbott is using the case to warn travellers they must obey the laws of the countries they visit.
Christian missionary John Short, 75, was taken in for questioning by North Korean authorities on Sunday, 24 hours after arriving in the capital, Pyongyang.
"I have no new news," wife Karen Short told AAP from the couple's home in Hong Kong on Thursday night.
"I have been in touch with the Australian consulate here - they have nothing to report. A contact in Beijing is in touch with North Korea, but there is no response."
Travel companion Wang Chong told the ABC that Mr Short had left pamphlets promoting Christianity at a Buddhist temple in Pyongyang.
Authorities were later informed by Mr Short's tour company of his actions, which breach North Korean laws against spreading religious material.
Mr Abbott said the federal government did what it could to help citizens in trouble abroad.
"But I do have this message for Australians abroad: you do have to be careful to obey the laws of the country you're in," he told reporters in Sydney on Thursday.
"Not all countries have the same legal system or the same laws as Australia."
The Department of Foreign Affairs and Trade is in contact with Swedish authorities, who handle Australia's consular interests in North Korea, to try to confirm Mr Short's wellbeing.
Mrs Short has had no contact with her husband since he left Hong Kong more than a week ago.
"I'm thinking carefully about what the next step is going to be," she said.
"I don't know if (Canberra) is sending someone (to Pyongyang) or if it's not a priority for them, although the case seems to be getting a lot of media."
Mrs Short said she and her three sons were encouraged by widespread messages of support.
She added that the family had chosen not to travel to North Korea.
"I don't think it would help at this stage."
Earlier this week, a United Nations-mandated human rights panel released a report containing evidence of widespread, systematic and grave human rights violations by the reclusive regime.
North Korea is also holding US citizen Kenneth Bae, described by a North Korean court as a militant Christian evangelist.
He was sentenced to 15 years' hard labour on charges of seeking to topple the government.
Mr Short, who was making his second trip to North Korea and was due home on Thursday, could face a similar fate.