Officers found the suspect dead at a home in Normanhurst.
The scene of the shooting in Normanhurst, Sydney, and John Edwards.
John Edwards was found dead the morning after he killed his 15-year-old son and 13-year-old daughter in a bedroom at their Hull Road home at West Pennant Hills about 5.20pm on Thursday.
McFadden confirmed the teenagers' mother, aged 36, arrived at the house in West Pennant Hills shortly after the police and was treated for severe shock by paramedics.
"We will be extending that support through additional counselling services today", Mr McFadden said.
"We consider this to be very much a targeted incident and we do believe that it may well be domestic violence-related", said Brett McFadden, acting assistant commander of the NSW Police north-west region metropolitan command, adding that the scene was "harrowing".
Police say the parents' long-term relationship had broken down and a custody battle had been ongoing for about two years.
NSW Ambulance Inspector Kevin McSweeney said when paramedics arrived at the scene they were confronted with "an extremely distressing and stressful situation".
Wimbledon 2018: Roger Federer continues flawless start at SW19
Adrian Mannarino came through in five sets against Daniil Medvedev , winning 6-4 6-3 4-6 5-7 6-3 to set up a clash with Federer. Seven-times champion Williams rallied from 5-3 down in the second set to put away France's Kristina Mladenovic 7-5 7-6 (7-2).
American Madison Keys celebrated Independence Day moving into the third round easing past Thailand's Luksika Kumkhum 6-4 6-3. The pressure showed on Wozniacki's face as she erred three times handing Makarova match point opportunities.
Mais des pluies attendues prochainement pourraient réduire une bonne partie du rebord boueux sur lequel le groupe a trouvé refuge. Le parcours de retour est long de plusieurs kilomètres dans des boyaux accidentés, avec de difficiles passages sous l'eau.
The game went to extra-time with Subasic staying on the pitch despite appearing to injure his hamstring late on in normal time. Captain Luka Modric is expected to partner Ivan Rakitic in the midfield, while Mandzukic will lead the attack line.
Nonfarm payrolls rose by 213,000 jobs last month as manufacturers stepped up hiring, the Labor Department said on Friday. Minutes of the Fed's June 12-13 policy meeting published on Thursday offered an upbeat assessment of the labor market.
Le consulat général de Chine à Songkhla a déclaré vendredi que parmi les 53 personnes disparues, 50 étaient des touristes chinois. Le corps d'un homme portant un gilet de sauvetage avec le logo du bateau, le Phoenix , a été sorti de la mer.
USA tariffs on steel and aluminum imports have provoked retaliatory measures against billions of dollars of American exports. US officials and business owners have warned Trump that the tariffs will be a major hit to American companies.
The first of those three games saw the Three Lions take on Sweden in Samara in the World Cup quarter-final on Saturday afternoon. But Dele doubled the Three Lions' lead when he timed his run at the back post and headed in a cross delivered by Jesse Lingard .
As bigger than Cormier as Miocic has looked this week, when they weighed-in on Friday morning the scales told a different story. Cormier has been trying to carve a niche of his own but the specter of Jon Jones looms no matter how high he flies.
Elle intervient par ailleurs dans un contexte épineux, puisque les Etats-Unis et la Chine s'apprêtent à durcir leur bras de fer commercial vendredi, avec l'entrée en vigueur de taxes réciproques sur des dizaines de milliards de dollars de marchandises.
The Superfight: Champions Cormier, Miocic collide at UFC 226
As the two were pushed away from each other, Cormier told Lesnar "Push me now, you go to sleep later", before pushing Lesnar back. Lesnar came out to witness first hand the fight for the UFC heavyweight title between Daniel Cormier and Stipe Miocic .
North Korea says talks with Pompeo were 'regrettable'
A meeting will take place between a team from the Pentagon and North Korea at the South-North border next week, Pompeo explained. North Korea committed at the summit to the "immediate repatriation" of remains already identified, but that hasn't happened yet.
Japon : l'ancien gourou de la secte Aum a été exécuté
La probabilité qu'ils soient pendus rapidement s'était renforcée ces derniers temps avec le déplacement de plusieurs d'entre eux. Ils avaient tous été condamnés à mort pour leur responsabilité dans l'attaque au gaz sarin dans le métro de Tokyo en mars 1995.