What is the reason behind Malaysia's new security law?

Malaysia's controversial new security law comes into effect, giving Prime Minister Najib Razak sweeping powers.

A new security law in Malaysia came into force on Monday, one that critics say gives the government broad, unchecked powers.

It allows for authorities to create a so-called 'security zone' inside which arrests and seizures can happen without warrants.

Some say the government could use this law to ward off political and legal challenges.

But Prime Minister Najib Razak says the security law is crucial for protecting Malaysian citizens.

In a statement, Najib's office said the National Security Council Act has been deliberately misinterpreted.