New surveillance footage from Malaysia's Kuala Lumpur International Airport shows the purported assassination of North Korean leader Kim Jong Un's estranged half-brother, Kim Jong Nam.

The footage, obtained by Japanese television, appears to show a woman wearing a white shirt coming up from behind Jong Nam and holding something over his mouth.

On "America's Newsroom" Monday, Fox News foreign affairs correspondent Benjamin Hall reported the latest information live from London, saying it seems likely the North Korean government orchestrated the attack.

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Hall said police are trying to piece together the final moments of Jong Nam's life.

The video shows Jong Nam seeking help as he wipes his face and eyes. He was then reportedly escorted to a medical clinic where he was said to have collapsed.

Hall said that whatever was used on Jong Nam was a fast-acting agent, as he was pronounced dead shortly after being rushed to the hospital.

Police said four arrests have been made thus far. One of the arrested women claimed she was duped into thinking she was part of a comedy show prank, Indonesia's police chief Tito Karnavian said.

The woman "was not aware that it was an assassination attempt by alleged foreign agents," Karnavian said.

Authorities are also said to be searching for four North Korean men who boarded a flight to Dubai the same day of the attack.

The men are believed to be North Korean agents who watched the attack take place.

Watch Hall's full report above.

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