Selangor PAS chief Sallehen Mukhyi said the party's Seri Setia by-election candidate Dr Halimah Ali was not involved in the arrest of a party leader by the MACC for alleged graft.

"It doesn't affect our Seri Setia candidate. The arrest is not an issue. It does not involve Halimah," Sallehen was quoted as saying by Sinar Harian.

The commission arrested an unnamed former Selangor assemblyperson from PAS yesterday. She was brought to the Shah Alam Magistrate's Court this morning and was remanded for two days.

Sallehen stressed that the case was still in the investigation stage, adding that he would leave the matter to the wisdom of the MACC.

The former assemblyperson is being investigated under Section 23 of the MACC Act 2009 for allegedly abusing government funds amounting to RM50,000.

Section 23 of the MACC Act concerns the offence of using office or position for gratification.

Meanwhile, Halimah questioned the timing of MACC's move just four days ahead of the Seri Setia by-election.

"Why now? I hope MACC conducts its duty properly and in a professional manner and not based upon pressure," she was quoted as saying by Berita Harian.

Halimah held the Selat Klang state seat from 2008, but was defeated in the 14th general election.

For the Seri Setia polls this Saturday, she will face off against Pakatan Harapan's Halimey Abu Bakar in a straight fight.

The by-election was called after the death of incumbent Shaharuddin Badaruddin from cancer on Aug  2.