Schools have independently increased their lockdown and training drills as education bosses carry out their own review into lockdown guidelines after the March 15 Christchurch mosque shootings.

The Ministry of Education is carrying out a wide-ranging review of all processes relating to lockdowns after the shootings.

Several schools were placed in lockdown during the attacks, in which 51 Muslim worshippers lost their lives.

Just days after the mosque attacks, a person with a BB gun put multiple West Auckland schools in lockdown.

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The Avondale schools were ordered to go into lockdown by police as a precaution.

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