Te Papa will be closed for a second day after sprinklers doused two of its floors yesterday evening.
Sprinklers were activated in the museum's ground floor and first floor foyers on Wednesday night despite there being no fire.
A Te Papa spokeswoman said collection stores and exhibition areas were not affected and no one was hurt.
Te Papa was closed today, and a team was on site assessing the situation, testing the museum's systems, and looking into what happened, she said.
To continue this, it will also be closed tomorrow.