A kitten has died but its sibling has been rescued after they were thrown out of a moving car on a motorway, in what the SPCA has blasted as a "despicable act".
The two kittens were seen being tossed out of a window early on Wednesday afternoon, heading towards Albany near the Greenhithe Bridge.
One had already died by the time rescuers reached the scene, but the other escaped with only minor injuries.
Andrea Midgen, SPCA Auckland's chief executive, is pleading for anyone who has any information or saw anything to come forward.
"This is a despicable act that inflicted serious pain and suffering on two innocent cats. It's important that those responsible for this cruelty are held accountable," she said.
The surviving kitten is currently being cared for at the SPCA Auckland Animal Hospital.
"We want to send a clear message to all Aucklanders that intentionally harming and causing injuries to animals is absolutely unacceptable," Ms Gilchrist said.
Animal cruelty is punishable by a fine of up to $50,000, or a jail term of up to 12 months, as part of the Animal Welfare Act.
Information can be provided to SPCA Auckland on (09) 256 7300.