US citizens held by North Korea
As North Korea jails Pae Jun-ho, a US national also known as Kenneth Bae, for 15 years, the BBC looks at other recent cases of Americans who were detained by North Korea and what happened.
Eddie Jun Yong-su: November 2010 - May 2011
Mr Jun, a businessman, was arrested in November 2010 for an unspecified "grave crime", and detained in North Korea for six months.
It was reported that he may have been involved in missionary work during business trips to North Korea.
The communist state views organised religious activity as a potential challenge to its leadership.
North Korean state media said that he had confessed to wrongdoing, and that he was treated well in custody, being allowed diplomatic contact and family phone calls.
Visiting US officials repeatedly requested his release, including Robert King, the US special envoy for human rights, who was visiting North Korea to assess its food situation.
During Mr King's visit, the North agreed to free Mr Jun on "humanitarian grounds".
Mr Jun was flown out with Mr King's delegation.
The US had suspended its food aid to North Korea in 2009 amid concerns over the North's nuclear programme, and Mr King stressed that Pyongyang had not been promised aid in return for Mr King's release.
Aijalon Mahli Gomes: April - August 2010
Aijalon Mahli Gomes, 31, was sentenced to eight years' hard labour for illegally entering North Korea from China in 2010.
He had been teaching English in South Korea, but reportedly crossed into North Korea in January 2010. He was arrested in April that year.
Mr Gomes, a devout Christian, was thought to have gone to North Korea on a one-man peace mission.
North Korean media said he tried to commit suicide while in detention.
Mr Gomes' detention came during a period of heightened tensions on the Korean Peninsula.
In March 2010, South Korea's Cheonan warship sank, killing 46 sailors. International investigators said that the vessel had been sunk by a North Korean torpedo, something Pyongyang denied.
Soon afterwards, the US and South Korea took part in joint military drills, sparking anger from North Korea.
Six-party talks aimed at ending North Korea's nuclear programme had also been stalled for several months.
Former US President Jimmy Carter secured Mr Gomes' release during a "private humanitarian trip" to North Korea in August 2010.
During his trip, he met North Korean officials, including ceremonial head of state Kim Yong-nam.
North Korean media said that Kim Yong-nam expressed North Korea's commitment to resuming six-party negotiations on its nuclear programme, during his talks with Mr Carter.
Robert Park: December 2009 - February 2010
US Christian activist Robert Park entered North Korea on 25 December 2009, carrying a letter for then-North Korean leader Kim Jong-il.
He crossed into North Korea from China by walking over a frozen river. He was arrested almost instantly.
He told the BBC he had decided to make the trip because his conscience had been tormented by the thought of people suffering in North Korea.
He said he was tortured while in custody.
In February, North Korea said it had decided to "forgive and release" Mr Park.
North Korean media said he confessed to crossing the border, and agreed that his view of North Korea was based on false reports.
He now realised that religious freedom was ensured in North Korea, North Korea's main news agency added - something his colleagues described as "propaganda".
Laura Ling and Euna Lee: March - August 2009
Laura Ling and Euna Lee, reporters for California-based Current TV, were jailed for illegally entering North Korea and sentenced to 12 years hard labour.
They had been filming a video about North Korean refugees, and admitted to entering North Korea for a short time, but said they were on the Chinese side of the border when they were arrested.
"We were firmly back inside China when the soldiers apprehended us," they said.
"We tried with all our might to cling to bushes, ground, anything that would keep us on Chinese soil, but we were no match for the determined soldiers."
They said it was possible that they had been lured into a trap.
Their detention took place during a period of high tensions between Pyongyang and Washington. In April, North Korea dropped out of six-party denuclearisation talks, and in May, it said it had successfully completed its second nuclear test.
The two journalists were issued with a special pardon after former US President Bill Clinton visited Pyongyang, and returned to Los Angeles on a chartered flight with Mr Clinton.
Official North Korean reports said that Mr Clinton had apologised on behalf of the US for the actions of the two reporters - something denied by the US, who said Mr Clinton carried no message to North Korea.
Correspondents said that it appeared that the women had been held in relative comfort in a guest house for most of their time in North Korea, and been used by North Korea as a diplomatic tool to secure a visit by a high-profile US envoy.