A mother and her unborn baby have been killed in a head-on crash in Melbourne's southeast. A mother and her unborn baby have been killed in a head-on crash in Melbourne's southeast....A man has died and another is in hospital after a second fatal head-on crash in a week in Melbourne’s southeast. Police are investigating the two vehicle collision in Pakenham after a white Toyota van collided head-on with a silver Mitsubishi ute about 6.30am on Tuesday. Emergency services tried to save the driver of the Toyota, but he died at the scene on Pakenham Road. It’s the second fatal head-on crash in Pakenham in the past week after a mother and her unborn child were killed after a collision on the Healesville-Koo Wee Rup Road on Thursday.