UPDATE: Police have charged a 16-year-old girl with the serious assault of a police officer for allegedly slashing a male officer with a shard of glass near Denmark Hill yesterday.
The Constable required 11 stitches to a cut on his hand, and was treated for a dislocated knee cap and possible disease exposure.
The teen was charged with two counts of serious assault of an officer; and one count each of wilful damage and unlawful wounding.
She will be dealt with under the provisions of the Youth Justice Act.
Ipswich District Inspector Keith McDonald said the officer has taken time off to recover from his injuries.
"Any attack on a police officer is an attack that's not welcome. Police deal with people in an agitated state every day as a part of their job," he said.
"He is very, very lucky that he received just cuts to his hand, because it could've been quite tragic."
EARLIER: A teenage girl armed with three knives and a broken piece of glass allegedly slashed a police officer during a stand-off in suburban Ipswich yesterday afternoon.
The officer suffered a cut to his arm and a dislocated kneecap during the struggle to restrain the 16-year-old girl in Hancock St near Denmark Hill.
Only minutes earlier, the teen is alleged to have threatened staff at a Uniting Care house with the knives.
Emergency services were called and first spotted the teen walking along Murphy St about 1pm.
The girl fled from police into Hancock St, where police attempted to restrain her on the edge of bushland.
As police closed in, the girl allegedly lashed out at the officer with the broken piece of glass, cutting his arm. Three police cars and three Queensland Ambulance Service vehicles were in the dead-end street to treat the officer and deal with the girl.
Neighbours watched as emergency services attempted to restrain the girl. The teen could be heard screaming as paramedics attempted to calm her.
The officer was taken to Ipswich Hospital in a stable condition. The teen was also taken to Ipswich Hospital for mental health assessment.
Police remained at the scene into the afternoon as investigations continued.