Scared Burton residents say they are still being 'pelted' by rock throwers, as teenage girl is hospitalised

Residents are going to extreme lengths to protect their property after being targeted by rock throwers for months. (ABC News: Richard Davies)

Residents of a suburban street being "pelted by rocks" say a teenage girl has been sent to hospital after being hit on the head in the latest incident.

Tash Peterson, a resident of Wattlebird Drive at Burton, north of Adelaide, said that although police had put on extra resources in the area, the rock-throwing has not eased.

She and other residents spoke to the ABC in early May, and at the time said it had been happening for weeks.

"We're still being pelted by rocks," she told ABC Radio Adelaide's Spence Denny this morning.

"We've had numerous houses and cars still being damaged.

Ms Peterson said the young girl had gone outside to move her car on Tuesday night when one of the rocks hit her.

She said residents were starting to get "really frustrated" at how unsafe the neighbourhood had become.

"We're all trying to stay calm," she said.

"We are starting to lose it."

Tash says her son is "petrified", and that the pair are locking themselves indoors at night. (ABC News: Richard Davies)

'Assault territory', police say

Northern District Police Officer in Charge Superintendent Guy Buckley, said they were "very, very frustrated with this situation as well".

"We feel the frustration and we are working with the community," he said.

"We're down there talking to them regularly.

"And to this point, we still haven't been able to detect who is actually launching the rocks."

Teen treated for concussion as rock throwers torment Wattlebird Drive residents

Superintendent Buckley said news of someone being hospitalised meant that the issue had moved into the category of assault.

"We don't know the motivation of the individual or the individuals who are doing this," he said.

A car covered with tarps on the Burton street. (ABC News: Richard Davies)

"In our eyes, the behaviour is significant, it's extreme and it's ridiculous, and I don't know what they're trying to achieve with what they're doing."

Although he could not "talk about exact tactics" officers had been using, Superintendent Buckley conceded what they had tried so far had not been successful.

He said officers' work was "ongoing" in the area, and that they would continue working with the community members — with additional resources, including from other agencies, being explored to help solve the issue.

"We will not give up until we identify the individual or the individuals, and they'll be held to account."