An emergency zone has been declared in inner Ipswich after a car crash caused a potential gas leak.
Police said two cars crashed at the intersection of Clifton Street and Alexandra Street in Booval about 11.30am, with one vehicle hitting a high-pressure gas main.
People have been told to stay away from an area bounded by Alexandra Street, Clifton Street, Bergin Street and Dudleigh Street.
Residents of homes within the exclusion zone have been told to remain indoors, with doors and windows closed.