Several New Zealand websites appear to have been hacked overnight.
The Labtests, Canterbury Southern Community Laboratories and Southern Community Labs websites were hacked.
The websites were this morning taken over by a black page with Turkish text, apart from the line "We Are Turkish Hacker" in English.
The websites were later taken down.
Kaan Reis, a member of a group called Spy-Hatz, claimed to have hacked the websites.
The sites appear to be among more than 1000 websites around the world affected by the hacker.
While the three hacked New Zealand sites all belong to laboratory contractors, other websites hacked by Kaan Reis range from news organisations to freight companies.
No explanation for the attack has been given on either the hacked sites, or Spy-Hatz's Twitter or Facebook pages.