Parliament has boosted its security significantly while the national security threat level remains high after the Christchurch attacks.
Access for vehicles and people will be much more tightly restricted, with parliamentary security stationed around the precinct.
All public tours have been cancelled for now.
Select committees will operate as usual but a police dog and handler will be sweeping each room before any are used.
The debating chamber will also be checked by police before Tuesday's sitting; the public galleries will be open to the public but police officers will be present.
All MPs' electorate offices in the Otago and Canterbury regions will be closed on Monday and Tuesday.
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Other offices around the country will stay open but the front doors will be locked - visitors will only be allowed by appointment and if they are known by staff not to be a security risk.
Anyone working around Parliament or in an electorate office who notices anything suspicious is asked to notify parliamentary security or the police immediately.
Meanwhile, Cabinet will meet as usual and get a briefing on gun law changes, as well as updates from law enforcement and intelligence agencies.
On Tuesday the House will pay respect to the victims of the attack and them adjourn for the day. There will be no usual business and no question time.
Condolence books will be made available at Parliament and the National Library tomorrow.