Eleven break-and-enters occurred in The Hills police command on Friday and over the weekend.
Three occurred in Carlingford, two each in Rouse Hill and Baulkham Hills, and one each in North Rocks, Dural, Bella Vista and West Pennant Hills.
In Baulkham Hills, three Persian rugs valued at $10,000, cash and jewellery were taken from a home in Arthur Street, between 2pm and 7pm, Friday.
In Bella Vista, $5000 in cash and jewellery was stolen from a home in Patrine Place between 6pm and 10.30pm, Friday.
Other robberies included the theft of copper wire from from an industrial site in North Rocks Road, North Rocks between 2.30pm, Saturday and 6.30am, Monday; and the stealing of $150 in cash from a home in Coachwood Close, Rouse Hill at 8pm, Friday.
Hills police said the incidents brought to 20 the number of break-and-enters since August 1.
On Wednesday police charged a 24-year-old woman over a critically injured child in North Rocks. The two-year-old boy has been hospitalised for one week in a critical condition.
Police had already charged a 39-year-old man with inflicting grievous bodily harm over the same case on Friday.
The child was taken to Westmead Hospital with serious head and body injuries on Wednesday, July 30.
The woman was refused bail and appeared in Parramatta Local Court. The child remains in a critical but stable condition.
A motorist hit and injured a cow in Terry Road, Box Hill on Sunday.
Police said the driver, a 38-year-old Box Hill man, was travelling on the road near Alan Street, at about 10.50pm.
He told police he noticed the cow on the road, but it was too late to stop and the car ran into the animal.
Police said they had no information on how badly the cow was injured, but inquiries were continuing.
They also reminded farmers to keep animals secured and ensure they did not wander on to roads.
On Saturday a motorist was killed when the ute he was driving crashed in Castle Hill Road, Castle Hill.
Police said the 64-year-old Hornsby man was travelling on the road between 2.30pm and 3pm.
Witnesses told police they saw his vehicle swerve across the road, between Glen and Highs roads, strike a gutter and mount a footpath, crashing into its handrail.
Police believe the handrail struck the driver, causing his death.
Firefighters and a passing doctor tried to revive the man.
A man robbed a woman motorist of $4900 while her car was idling at traffic lights in Northmead on Wednesday.
The woman, 36, of Kellyville, and her son who was also in the car, stopped at the intersection of the Cumberland Highway and Old Windsor Road about 7.45pm.
She said the man opened the passenger door, leaned into the car across her son and snatched her bag and wallet, worth $4900 in total.
She described the man as being of Pacific Islander appearance, with facial hair, large build, aged 30 to 35 years.