A "suspicious package" that led to the bomb squad being called to a western Sydney police station was apparently sent by police in Victoria.

Wentworthville police station and surrounding houses were evacuated, the road was closed and an exclusion zone was established after the package was delivered on Friday morning.

"They didn't know if it was a bomb": Suspicious parcel that triggered bomb scare was sent by Victoria Police. Credit:Twitter/@AirlieWalsh

"An unusually-shaped package wrapped in brown paper was left on the front desk and no one had signed for it. They didn't know if it was a bomb," Wentworthville Fire Station Officer Adam Turnor-Browne told local newspaper Parramatta Advertiser.