Update 5: Explosion, West Ipswich.

Police have declared an emergent situation under the Public Safety Preservation Act in West Ipswich.

The declaration was made at 9.20am and includes residents and streets within the boundary from Brisbane Street to the east, Burnett, Darling East, Syntax and Herbert streets to the north, Challinor and Johnstone streets to the west and Tiger Street to the south.

Police are advising residents to remain inside with no evacuations required at this time.

Specialist police are currently conducting further examinations at the property on Clay Street where an explosion occurred around 6.30pm on Thursday night.

Investigations into the incident are continuing.

Further advice will be provided when the emergent situation is revoked.

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.

Report crime information anonymously via Crime Stoppers. Call 1800 333 000 or report online at www.crimestoppersqld.com.au.