Malaysia's Prime Minister Najib Razak will get sweeping security powers on Monday amid planned protests calling for his resignation over U.S. allegations that millions of dollars from a state fund wound up in his personal bank account.

The new National Security Council (NSC) Act, which comes into force on Aug. 1, allows Najib to designate any area as a "security area" where he can deploy forces to search any individual, vehicle or premise without a warrant. It also allows investigators to dispense with formal inquests into killings by the police or armed forces in those areas.

Najib's ruling coalition promoted the law as a means to counter threats to security in predominantly Muslim Malaysia, which has long dealt with a fringe element of radical Islamists.