Image: 9 News Sydney
A two-year-old girl has been rushed to hospital in a critical condition after being found unresponsive inside a parked car in western Sydney.
Emergency services were called to McCredie Road in Guildford West around 3.30pm on Monday following reports of a concern for welfare, where they discovered the toddler has gone into cardiac arrest.
A 22-year-old man known to the girl was arrested at Fairfield just before 5pm and is assisting police with their inquiries.
A crime scene has been established at the Guilford West scene and another in a neighbouring suburb.
The circumstances surrounding the incident are not yet known, police say.
Police have since addressed the media regarding the tragedy.