Two teenage girls have been charged with murder over the death of a Brisbane teen who fell from the fourth storey of a Gold Coast apartment while trying to escape being robbed at knifepoint.

The girls, aged 15 and 16 from Coomera, will be charged on Thursday with the murder, robbery, deprivation of liberty and torture of Cian English in Surfers Paradise last month.
Police allege both girls filmed Mr Englishās assault, torture and death, and actively encouraged the behaviour.
āThese girls were actively at the scene. Legislation allows people to be charged with being a party to an offence. The girls videoed the incident and the torture on the boys, both English and his friend, and they took no active step ⦠itās clear they were actively encouraging it,ā Detective Inspector Brendan Smith told reporters.
āWe will be alleging they have seen him go over the verandah.
āThey have looked down and saw he is obviously deceased and then they have stolen clothing off another unconscious male on the verandah.
āIt really is beyond belief these people behave like this.ā
Three other men who have also been charged with teenās murder remain in custody.
Mr Englishās body was discovered at the base of an apartment complex at View Avenue in the early hours of May 23.
Police allege he was trying to escape being robbed by the three men at knifepoint when he fell to his death.
-AAP
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