Serious crash between two trucks closes SA highway

A serious crash between two trucks has closed a highway on South Australia's Eyre Peninsula.

Police were called to the Eyre Highway at Yalata, on the edge of the Nullarbor, about 6.45am.

The highway is closed in both directions as emergency services investigate.

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"All trucks should park at Yalata or other major service stations," South Australian Police said in a statement.

"Please be patient while crews attend the scene."

The highway is a main freight route between Perth and Adelaide.