The Royal Malaysia Police (RMP) have arrested a female suspect in its investigation into the death of a North Korean man at the Kuala Lumpur International Airport 2 (klia2) on Monday.

Inspector General of Police Tan Sri Khalid Abu Bakar in a statement today said the suspect was apprehended in the klia2 at 8.20 am, Tuesday.

“On 15 February 2017 at about 0820hrs, the Royal Malaysia Police (RMP) arrested a female suspect at the Kuala Lumpur International Airport 2 (klia2),” said Khalid in a statement today.

The 29-year-old suspect, identified from the CCTV footage at the airport, was said to be in possession of a Socialist Republic of Vietnam travel document.

Police identified her as Doan Thi Huong and she was said to be alone at the time of her arrest, according to the statement.

On Monday, a North Korean man died on the way to the hospital from klia2 after complaining of ill health and trying to seek medical assistance at the airport customer service counter.

The deceased was believed to be Kim Jong-Nam, half-brother of North Korean leader Kim Jong Un, who had reportedly about to board a flight to Macau at 9am.

READ: South Korea says believes Kim Jong Nam was murdered

However, police are still investigating the real identity of the North Korean national who was identified as Kim Chol, 47, based on the name on his travel document.

"So far, what we can confirm is that the Korean national was known as Kim Chol based on the victim's travel document, but we are still investigating whether the passport was genuine or false," said Deputy Inspector-General of Police Tan Sri Noor Rashid Ibrahim today.

Meanwhile, the body of Kim Chol had been taken to the Kuala Lumpur Hospital's (HKL) Forensic Unit at 9.30am today from Putrajaya Hospital under tight police security.

READ: Kim Jong-Nam's mortuary van left Putrajaya Hospital to HKL for post mortem