Prime Minister Najib Abdul Razak must instruct Home Minister Ahmad Zahid Hamidi to resign, PKR Youth vice-chief Fahmi Fadzil said today.

This should be done pending a full investigation that must be conducted into Zahid's letter to the Federal Bureau of Investigations (FBI) clearing gambling kingpin Paul Phua Wei Seng's involvement in the 14K triad.

As such, Fahmi, together with PKR Youth chief Nik Nazmi Nik Ahmad, are to lodge a police report on the matter at 5.30pm today.

"This is to urge the police to conduct a full investigation into the matter. I believe the police will be fair and professional," Fahmi ( right ) said.

He said he had written a letter to Zahid on Jan 8, asking the minister to explain seven questions on his involvement with Phua and the motive behind the letter he wrote.

However, Fahmi lamented that Zahid had not given a thorough explanation on the matter, with Deputy Prime Minister Muhyiddin Yassin and Defence Minister Hishammuddin Hussein reserving their comments on the matter as well.

"Why wasn't the matter discussed at last week's cabinet meeting? Did Najib not instruct Zahid to explain the matter to him and the other ministers?" Fahmi asked.

In the letter to the FBI issued on the request of Phua’s lawyer Muhammad Shafee Abdullah, Zahid ( right ) had cleared Phua of involvement in illegal drugs, gambling and money laundering activities.

Shafee said the letter was written by Zahid to clear a mistake by the Malaysian police in their report on Phua to the FBI.

Asked about this at a press conference Zahid held later, the minister declined to comment, saying he would respond later.