North Korea barred Malaysians from leaving the country on Tuesday, prompting Malaysia to take tit-for-tat action, as police in Kuala Lumpur sought to question up to three men hiding in the North Korean embassy over the murder of Kim Jong Nam.
Malaysia has been outraged by the murder of the North Korean leader's estranged half brother at Kuala Lumpur International Airport on February 13 by assassins using VX nerve agent, a super toxic chemical listed by the United Nations as a weapon of mass destruction.
Police have identified eight North Koreans wanted in connection with the murder, including a senior North Korean diplomat and a state airline employee. The only people charged so far are a Vietnamese woman and an Indonesian woman.
As the row escalated on Tuesday, state-run KCNA news agency reported that North Korea's foreign ministry had issued a temporary ban on Malaysians leaving in order to ensure the safety of its own diplomats and citizens in Malaysia. It effectively made Malaysians hostage in the reclusive, isolated state.
Malaysia reacted promptly. Deputy Prime Minister Ahmad Zahid Hamidi announced a ban on North Koreans leaving the Southeast Asian country with immediate effect.
Zahid later clarified to reporters that only North Korean embassy staff and officials were banned from leaving Malaysia.
Before the murder, North Korea could count Malaysia as one of its few friends, but Malaysia has since stopped visa-free travel and on Monday it expelled North Korea's ambassador for questioning the impartiality of the murder investigation.
There are 11 Malaysians believed to be in North Korea, according to a Malaysian foreign ministry source, including three embassy staff and six family members, plus two others working in the country.


