Emergency services are heading to a crash in South Auckland near Auckland's Sylvia Park where a person is believed to be trapped.

A police spokeswoman confirmed there'd been an accident at around 1:25pm on Mount Wellington Highway.

She said there were eye-witness reports a person was trapped, but emergency personnel were still en route to assess the situation.

A police spokeswoman said the accident didn't appear to be serious as there were no reports of injuries.

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"We were there for two minutes."

She said there was nothing to suggest earlier reports indicating someone was trapped were true.

"There's nothing in here to suggest that."