A police officer was seriously assaulted during an arrest in Sinclair Drive at Carole Park at 3.30pm (AEST) yesterday.
Police say the male officer was investigating a separate matter when a 17-year-old girl allegedly became verbally and physically aggressive.
"The girl allegedly spat in the Senior Constable's face before a 37-year-old woman became involved and allegedly scratched the officer's chest, tore his shirt and gouged his ear," police said.
The officer was treated at the Mater Hospital for his injuries.
The 17-year-old girl was arrested and charged with two counts of serious assault and one count of obstruct police.
The 37-year-old woman was arrested and charged with one count each of serious assault and wilful damage.
They have been held in custody and will appear in the Richlands Magistrates Court today.
Meanwhile, police arrested a 16-year-old girl after she allegedly spat on an officer at Woodridge last night.
The female Sergeant was talking to the girl on Station Road at 8.40pm (AEST) when she allegedly became verbally abusive.
The girl then allegedly lashed out at the officer punching her several times and spitting at her.
The girl was arrested and charged with on count each of serious assault and obstruct police.
She has been held in custody to appear in the Beenleigh Children's Court today.