Four people are dead and a child is fighting for life in hospital after a chaotic night for police in Melbourne.
Two people were shot dead while a woman was allegedly stabbed to death in separate incidents.
A house fire also claimed a life in Endeavour Hills.
A man is being questioned by police after a fatal double shooting in the beachside suburb of Mordialloc.
Emergency services were called to a home in McDonald Street shortly after 9pm after reports of gunshots.
Two people were found at the scene suffering critical injuries and couldn’t be revived.
Two people were shot dead in Mordialloc in Melbourne’s south-east on Thursday night (pictured, police at the scene)
Police searched the area and arrested a man a short time later.
He is currently assisting police with their inquires. No charges have yet been laid.
Homicide squad detectives are also investigating a separate incident in the city’s north-east which left a woman dead, a child with critical injuries and a man after police guard in hospital.
Emergency services were called to a Kellaway Crescent home in Mill Park shortly before 8pm after reports of a stabbing.
A man, woman and a girl were found at the scene all suffering critical injuries.
The woman died at the scene and the man was taken to hospital under police guard in a critical condition.
The girl was also taken to hospital in critical condition.
Detectives believe all parties are known to each other.
A man is being question by police over the fatal double shooting in Mordialloc
The incident sparked a large emergency response, including the SES.
Kellaway Crescent was blocked with police vehicles at both ends of the street with one shocked neighbour describing the scenes as a ‘circus.’
‘There was a quite a few people around and they say they heard gunshots,’ another passer-by told the Herald Sun.
‘I saw people on an ambulance stretcher’.
Police are also investigating a fatal house fire in Endeavour Hills in the city’s south-east on Thursday night after firefighters found a man dead inside the gutted home.
The investigation into the fire is ongoing.
Four people are dead following a fatal double shooting, stabbing and house fire in Melbourne