Two more teenagers have been charged over the alleged assault and stabbing of a 16-year-old boy at a house party in Sydney's eastern suburbs last month.

Police were told the 16-year-old, along with an 18-year-old man, were approached by about 10 people on Carnegie Court, Chifley, at about 8.20pm on Saturday, July 5.

The 16-year-old was treated at the scene afterwards, before he was taken to hospital in a stable condition.

Yesterday, police arrested a 17-year-old boy in Maroubra and a 15-year-old boy in Bondi.

They were both charged with multiple offences, including wounding.

They were refused bail and will appear in the children's court today.

A 16-year-old boy and 18-year-old woman were previously charged and remain before the courts.

The investigation continues.

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