A press attache with the New Zealand Olympic equestrian team has had a frightening experience at the Deodoro event venue after she was nearly hit by a bullet.

Bullet hole in media tent at Olympic equestrian venue. The hole is the top white spot. Source: 1 NEWS

It missed Diana Dobson by approximately four metres while she was inside the media tent.

The bullet came through the canvas roof.

Diana Dobson Source: 1 NEWS

ONE News reporter Paul Hobbs was there and said Dobson was visibly shaken.

She doesn't believe the bullet was intended for the tent, rather it was fired from a distance and landed there.

It was a high calibre round, most likely from a military weapon.

"The New Zealand police assessment is that the bullet was fired unintentionally rather than with intent," the NZOC said in a statement.

Dobson said it made a strange noise as it pierced the roof of the tent.

NZ media have been advised to stick together at the venue.

The bullet that nearly hit Kiwi Diana Dobson. Authorities have confirmed it was a stray bullet, unrelated to the Games. Source: 1 NEWS

Brazilian military was quickly on the scene.

It's understood the bullet landed on the tent rather than being fired directly at it.

NZOC media head Ashley Abbott says the NZ delegation is taking the matter seriously.