The well-known Dutch investigative journalist Peter R. de Vries died after the attack on him, according to media reports.

"Peter fought to the end, but he lost the fight," said his family in a message published by RTL on Thursday.

The 64-year-old was gunned down on the street in Amsterdam last week and was critically injured.

A 21-year-old man from Rotterdam and a 35-year-old Polish citizen living in the Netherlands were arrested after the crime.

A third man, who was also arrested, was released.

De Vries is known for his role in high profile crime cases and as a spokesperson for crime victims.

According to media reports, he was most recently the confidante of the most important key witness in a trial against the alleged drug lord Ridouan Taghi.

According to earlier information from de Vries, he was on Taghi's "hit list".

The drug lord is the most wanted criminal in the Netherlands, his organization is described by prosecutors as a "well-oiled killing machine".

The attack on the journalist had caused horror across the borders of the Netherlands.