An Australian man who was detained during raids to disrupt what authorities described as an Islamic State-inspired plot to bomb an Etihad Airways flight has been charged with weapons offenses and released on bail, police said on Sunday.

The man was one of four detained during raids by counterterrorism police in suburbs in Sydney a week ago.

Two of the men were charged with terror-related offenses late on Thursday. Police allege one of them sent his unsuspecting brother to catch an Etihad Airways flight from Sydney on July 15 carrying a home-made bomb, which was disguised as a meat mincer, built at the direction of a senior commander in the militant Islamic State group.