The Gerakan, MCA and DAP held rallies and boycotted classes in Chinese primary schools to protest the move; UMNO Youth held its own rallies to assert "ketuanan Melayu", hosting banners with slogans such as "revoke the citizenship of those who opposed the Malay rulers", "13 May has begun", and "soak it "keris", a Malay dagger with Chinese blood". Future Deputy Prime Minister and then UMNO Youth Chief Najib Razak (the son of Tun Razak) threatened to bathe a "keris" with Chinese blood. The flames were fanned further when in an unrelated incident, a Malay soldier ran amok in a predominantly Chinese area, killing one and injuring another two.