Image copyright Reuters/AFP Image caption Doan Thi Huong (left) and Siti Aisyah (right) said they thought they were taking part in a TV prank

Two women implicated in the killing of the estranged brother of North Korea's leader will be charged with murder shortly, Malaysia's prosecutor says.

Attorney General Mohamed Apandi Ali said the women - from Indonesia and Vietnam - would be formally charged and could face death if convicted.

The women allegedly smeared a deadly chemical over Kim Jong-nam's face at a Malaysia airport earlier this month.

They have said they thought they were taking part in a TV prank.

"They will be charged in court under Section 302 of the penal code," the attorney general said, which is a murder charge with a mandatory death sentence if found guilty.

He said no decision had yet been taken on whether to charge a North Korean man, Ri Jong Chol, who is also being held over the killing.

That "depends on the outcome of the police investigation, which is still ongoing", Mr Apandi was quoted as saying by AFP news agency.

The two women - Doan Thi Huong from Vietnam and Siti Aisyah from Indonesia - are among some 10 suspects identified by Malaysia as being involved in the killing.

The other suspects include a senior official at the North Korean embassy in Kuala Lumpur and a staff member of the state airline. South Korea believes at least four suspects are North Korean spies.

Image copyright AP Image caption Kim Jong-nam had lived outside North Korea for many years

A high-level delegation from North Korea - led by the former ambassador to the UN - arrived in the Malaysian capital on Tuesday.

They said they were seeking the retrieval of the body and the release of Ri Jong Chol, as well as the "development of friendly relationships" between North Korea and Malaysia.

Media playback is unsupported on your device Media caption Kim Jong-nam was poisoned with an extraordinarily potent chemical weapon called VX

North Korea has not confirmed that the person killed on 13 February at Kuala Lumpur airport was Kim Jong-nam, the half brother of leader Kim Jong-un, saying only he was a North Korean travelling on a diplomatic passport.

Kim Jong-nam, 42, was at a check-in desk for a flight to Macau, where he lives, when he was accosted.

He was smeared with a very high amount of the toxic nerve agent VX and died in pain within 15-20 minutes, Malaysia's health minister said on Sunday.

Who are Doan Thi Huong and Siti Aisyah?

Image copyright AP Image caption Passport photo of Siti Aisyah

Little is known for definite about Doan Thi Huong and Siti Aisyah except that they had left their homes in different parts of Asia and were trying to make a living in Malaysia.

Malaysian police officials described Ms Huong, a 28-year-old from Vietnam, as an "entertainment outlet employee" while Ms Siti, 25 from Indonesia, was working in a hotel massage parlour.

It is clear they lived precarious existences, reports the BBC's Rupert Wingfield-Hayes who has been researching the story.

Ms Huong's Facebook page, in which she posted under the name Ruby Ruby, showed her posing in a number of selfies and glamour shots. There are rumours she once auditioned for Vietnam's version of Pop Idol.

Image copyright AP Image caption Doan Thi Huong's Facebook page

Her family said she left her home village in north Vietnam at 17 to study in the capital Hanoi, and had rarely returned home since. They said they were surprised to learn she was in Malaysia.

Her stepmother told BBC Vietnamese that the family were fed up with all the attention they had received but were grateful for the support of their neighbours.

"They are sympathetic because they don't understand how a daughter of a family with high moral values like us could become like that," Nguyen Thi Vy, 54, said.

Siti Aisyah was arrested for the killing along with her 26-year-old Malaysian boyfriend, who was later released on bail.

She told the Indonesian embassy officials that she thought she was taking part in a reality TV show, and had been paid 400 Malaysian ringgit ($90; £72) to smear what she thought was baby oil on to Mr Kim's face.

Ms Siti was out partying with her friends the night before the killing. A friend, who spoke anonymously, said they had been celebrating her birthday, which had been the day before. Film footage purportedly from the evening shows her talking with friends about becoming an internet star.

Who are the other suspects?

Image copyright Reuters

Ri Jong Chol, 47, is a North Korean who has lived in Malaysia for the last three years. He is in Malaysian detention.

Image copyright Malaysian police

The Malaysian boyfriend of Siti Aisyah, Muhammad Farid Jalaluddin, was arrested but police said he would be released on bail.

Image copyright AFP/Getty Images

Hyon Kwang Song, 44, second secretary at the North Korean embassy in Kuala Lumpur is being sought by police. He is believed to be in the embassy in Kuala Lumpur.

Image copyright AFP/Getty Images

Kim Uk Il, 37, is a staff member of North Korea's state airline Air Koryo, and is also believed to still be in Malaysia.

Image copyright AFP/Getty Images

Ri Ju U, 30, a North Korean also known as "James", has been identified by the women as the man who recruited them.

Image copyright AFP/Getty Images

Ri Ji Hyon, 33, a North Korean, is believed to have fled to Pyongyang.

Image copyright AFP/Getty Images

Hong Song Hac, 34, a North Korean, is believed to have fled to Pyongyang.

Image copyright Reuters

O Jong Gil, 55, a North Korean, is believed to have fled to Pyongyang.

Image copyright AFP/Getty Images

Ri Jae Nam, 57, a North Korean, is believed to have fled to Pyongyang.