Father abducts son at knifepoint from Sydney home A car allegedly used to abduct a baby boy from a home in Sydney's west has been found abandoned in Bargo, but police say there is still no sign of the child or his father. The Toyota Camry was found on Avon Dam Road about 6.50am on Friday, nearly 12 hours after the eight-month-old boy, Zayden, and the baby's 16-year-old mother were abducted from their home in Chester Hill at knifepoint. Police have not immediately confirmed witness reports that the car had crashed into a tree, but was empty when police arrived. Investigators have launched an urgent appeal to the public for help find the man and his son. Police said the 24-year-old was armed with a knife when he forced his way into a home on Kenthurst Place in Chester Hill about 8.30pm on Thursday and abducted his son and the teenager. The man, who had tattoos across his arms and chest, forced the pair into his black Toyota Camry and drove away. Police said about 10pm the car stopped at a truck stop on the Hume Highway at Douglas Park where the teenager was assaulted. The man then left the teenager by the side of the road and drove off with his baby son in the car. The man is between 165 and 175 centimetres tall, with a thin build, brown hair, and was wearing a blue jumper and green tracksuit pants. He has tattoos on his arms and chest. The baby's grandfather, Marco, appealed to the man to return the baby. Bring the child back safely. Don't do anything stupid, you know?" he told 2GB. I hope he doesn't do anything silly, that's all. The police helicopter and dog squad have set up a perimeter in Bargo and are searching the area for the man and his son. Police have asked anyone who sees the pair to call triple-0 immediately.