Police have declared an emergency situation following a truck fire earlier this morning in Loganholme.

Officers were called at 8.40am after a truck carrying a hydrocloric acid caught fire on the southbound lanes of the Pacific Motorway near the Logan Hyperdome.

Police have made a declaration under the Public Safety Preservation Act at 9.20am and both north and southbound lanes are currently closed.

The declaration area covers the both north and southbound lanes of the Pacific Motorway and a 1 km radius of the crash site.

People in the immediate vicinity are asked to say indoors and anyone with breathing difficulties should have medication or breathing aids with them.

If you have information for police, contact Policelink by providing information using the online suspicious activity form 24hrs per day at www.police.qld.gov.au/reporting.

You can report information about crime anonymously to Crime Stoppers, a registered charity and community volunteer organisation, via crimestoppersqld.com.au 24hrs per day.