Police were called after a 12-year-old girl was flashed by a man in Mcdonald Street, North Rocks, on Saturday 3.30pm.
Police say the girl was looking out her bedroom window when a man on the street pulled down his pants and showed her his genitals.
He was described as Caucasian, aged 17 or 18 years.
IN OTHER POLICE NEWS:
The takings from a Parramatta Chinese restaurant were stolen on the weekend.
The cash had been kept at a house in Stirling Avenue, North Rocks, but went missing between 7.30pm Friday and 10.30am Saturday.
An Apple laptop was stolen from a townhouse in Sandringham Drive, Carlingford, between midday and 1.50pm Saturday.
A Castle Hill man, 65, lost $40,000 in an email scam.
He told police he received an email in April telling him he had won $1 million in a lottery.
He was told on the email he would have to pay administrations fees for the $1 million to be transferred.
He continued making small payments that added to $40,000 before he reported the incident to police.
He was asked to lodge an application with the Australian Competition and Consumer Commission.
Castle Hill crime manager detective inspector Gary Bailey said it's very difficult to track offenders from such a fraud.
"A scam like this is prolific all over the world and involves overseas criminals," he said.
"People are advised not to get involved with email scams."
Residents are advised not to divulge personal information or bank account details on email to unknown sources.
Police are looking for a female suspect after at least four Sass and Bide dresses, valued at $500, were reported stolen from Myer at Castle Towers about 4pm on August 3.
While reviewing security footage police saw a woman entering the fitting rooms with two dresses and exiting with nothing. In the footage she returned to the fitting rooms with two more dresses, removed the tags and left the store.
The woman was described as being of Middle Eastern appearance, 1.65 metres tall, aged 20-25 years, with long dark hair.
Call Crime Stoppers on 1800 333 000.
Two houses robbed
A large amount of money and jewellery was stolen from two homes.
Between 2pm on August 2 and 7.30pm on August 4, a house on Oratava Avenue, West Pennant Hills was broken into via a forced door lock.
And between 10.30pm on Tuesday, August 6, and 5.30am on Wednesday a house on Telfer Road, Castle Hill was broken into and a safe was stolen. Residents found a flyscreen had been removed and windows smashed.