PSM's unilateral move to contest in seats currently held by Pakatan Harapan component parties will invite reciprocal action, Perak DAP chief Nga Kor Ming said today.

Nga said Perak Harapan will field a candidate in Sungai Siput, PSM's only seat in any legislative body.

"In view of PSM's unilateral decision to contest in DAP-held seats, Harapan will contest in Sungai Siput.

"This is to allow the wise Sungai Siput voters to choose a coalition capable of replacing Umno and BN," Nga said in a statement.