Teen in serious condition after stabbing in Sydney’s west overnight

Just after 1.30am today, emergency services responded to calls of a stabbing at a business on Graham Street in Doonside.
When they arrived, officers found an 18-year-old man suffering from multiple stab wounds.
He tended to at the scene by paramedics, before being taken to Westmead Hospital in a serious condition.
Police have established a crime scene and are calling on any members of the public who may have been in the area at the time, or anyone who has footage of the stabbing to come forward.
9NEWS