Summarize this content to 2000 words in 6 paragraphs A father and son have been stabbed to death after a toddler’s birthday party ended in a wild brawl in Melbourne’s outer south-east.Police were called to a property on Observatory Street in Clyde North at 9.30pm on Thursday following reports of an argument that spilled out onto the street.By the time emergency services arrived, the two men from Seaford – one aged 23, the other 54 – were found on opposite sides of the road with stab wounds.Despite medical treatment, they both died at the scene. Police are now searching for multiple people involved who left before officers arrived. Nine News reported family had gathered for a child’s first birthday party.Superintendent Janet Stevenson said what was meant to be a joyous night had taken a tragic turn, with about 20 people involved in the fight.“It was a private party. It should have been a great celebration, but it’s just dreadful,” said Stevenson.Investigators have spoken with some members of the victims’ family and party guests and are combing through CCTV footage from the area.But Stevenson said those who had left after the stabbing were key to piecing together what happened.“These people know who they are,” she said. “Don’t drag this out. It’s not good for anyone.”
