Two trucks have crashed on State Highway 1 in Waikato, spilling some of their loads and prompting police to put diversions in place.
Emergency services are at the scene of the crash at Atiamuri by the bridge over the Waikato River.
"It is understood that both trucks have shed some of their load - one logs and the other stock feed," police said.
Traffic was being diverted along Tirohanga and Ongaroto roads.
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Police have advised motorists to expect delays or seek an alternative route.