Inspector-general of police Khalid Abu Bakar has said the police have no qualms sharing information regarding the use of the VX nerve agent to kill Kim Jong-nam with the United Nations.

"If Wisma Putra gives us the green light, we have no issue with passing on the relevant information," he told Malaysiakini in a text message.

Khalid was responding to British ambassador to the UN Matthew Rycroft, who urged Malaysia to share the evidence in order for UN to act against North Korea.

According to AFP, Rycroft said the information could be sent to the Hague-based Organisation for the Prohibition of Chemical Weapons (OPCW).

"If they have got evidence, they should send it to the OPCW and to the Security Council. Once they have done that, then we can take it forward," he was quoted as saying.

Rycroft said he hoped any country "in this case Malaysia, with potential evidence of something as serious as this, makes it available as soon as possible".

Meanwhile, Japanese ambassador Koro Bessho said it is up to Putrajaya to decide on whether it wanted to share the information.

"We are basically waiting for Malaysia to come up with a clear-cut decision," he added.

Malaysia is a signatory to the Chemical Weapons Convention, which seeks to eliminate the use of the toxic agents.

Last week, OPCW said it was willing to extend its expertise and technical assistance to Malaysia.

Jong-nam, who is the half-brother of North Korean leader Kim Jong-un, was attacked at the Kuala Lumpur International Airport 2 (KLIA2) on Feb 13 as he was waiting to board a flight to Macau.

Two women, who were arrested in connection with the case are believed to have applied the VX nerve agent on the victim's face with their bare hands.

Over the weekend, Health Minister Dr S Subramaniam said Jong-nam suffered a painful death, with the substance affecting his heart and lungs.

The murder has also created a diplomatic row between Putrajaya and Pyongyang, with the latter accusing Malaysia of colluding with hostile forces, fabricating evidence and breaching human rights.

This has led to calls for Putrajaya to review its diplomatic ties with North Korea.