The arrest of a ministry secretary-general does not cover up the concerns raised by former top graftbuster Bahri Mohd Zin, PAS deputy president Tuan Ibrahim Tuan Man said today.

Yesterday's arrest only strengthens Bahri's complaints that he had sinned Malaysians by failing to get the SRC International case to court, Tuan Ibrahim said.

"How can the Malaysian Anti-Corruption Commission arrest civil servants so easily, but take no such action against SRC... which involves top politicians?

"If Bahri's allegations are true, who stopped the SRC case (from going to court) and who gave the green light to arrest the secretary-general?" Tuan Ibrahim asked in a statement.

The MACC yesterday arrested a ministry secretary-general and 29-year old man for abuse of power and graft.

theSun reported that the 29-year old was the secretary-general's son.

The arrests came a day after Bahri revealed he had opted for early retirement due to his frustrations over the SRC case.

The former MACC special operations director also said he was frustrated with the country’s "spider web laws" that only punished small offenders but let the bigger wrongdoers escape.

Previously a subsidiary of 1MDB, SRC International is now under the Finance Ministry. It came under the spotlight after RM42 million of its money was found in Prime Minister Najib Abdul Razak's personal bank account.

While MACC’s 1MDB investigations were complex and involved many overseas jurisdictions - with the attorney-general refusing mutual legal assistance to the commission to work with foreign investigators - the SRC case was clear-cut as it involved mostly local entities.

The SRC money was deposited into Najib's accounts in two transactions - on Dec 26, 2014 and Feb 10, 2015 - after being routed through two companies, Gandingan Mentari Sdn Bhd and Ihsan Perdana Sdn Bhd.

Najib has reportedly claimed to be unaware about the money from SRC, and attorney-general Mohamed Apandi Ali also cleared him of any wrongdoing in the matter.