Sydney terror conspiracy - what we know

WHAT WE KNOW ABOUT THE ALLEGED TERROR CONSPIRACY:

WHO?

* Four Lebanese brothers - three living in Sydney and one from Syria - have now been implicated in the plot

* Khaled Khayat, 49, and Mahmoud Khayat, 32 were arrested in Sydney in July and have been charged with planning or preparing for a terror attack

* Khaled Merhi, 39, was also arrested in the Sydney raids and has been charged with a non-terror related weapons offence

* Abdul Merhi, 50, was arrested but released without charge

WHAT IS ALLEGED?

* Khaled Khayat accompanied his brother Amen Khayat to Sydney's international airport on July 15

* Australian Federal Police say a bomb was hidden in a meat grinder while Lebanese authorities say another device was in a large child's doll

* Australian police say Amen Khayat had "no idea" he would be carrying a bomb but Lebanon's interior minister say he was involved as a would-be suicide bomber

* Khaled Khayat left the airport with the luggage reportedly because it was too heavy and Amen Khayat flew to Abu Dhabi on an uneventful Etihad flight then travelled to Lebanon

* Following the aborted effort the bomb or bombs were disassembled

* The AFP alleges the brothers then started building an "improvised chemical dispersion device" designed to release the highly toxic gas hydrogen sulfide

KEY DATES?

* Australian authorities receive information about the plot on July 26, then arrest the men after raids three days later

* Khaled Mahmoud Khayat and Mahmoud Khayat next face court on November 14

* Khaled Merhi is due to appear at Sydney's Downing Centre on August 24 on a weapons charge.