A man has been charged with murder after allegedly setting his father on fire outside a home in Sydney’s west on Thursday.

Emergency services were called to Wargon Crescent in Glenmore Park shortly before 1am on Thursday following reports of a fire, where they found the body of a man.

Police said the man, believed to be aged 64, was found with multiple ‘distressing’ injuries, including significant burns. He is yet to be formally identified.

The man’s 36-year-old son was arrested about five hours later after he was found inside a car in nearby Werrington.

‘The man was treated by NSW Ambulance paramedics for minor injuries before he was taken to Nepean Hospital under police guard,’ NSW Police said in a statement.

‘After being released from hospital, the man was taken to Penrith Police Station where he was charged with murder (DV).’

He was refused bail and is due to appear before Penrith Local Court later today, where police will allege the two men were known to each other.

It’s understood the man did not live at his father’s Glenmore Park home.

A man has been charged with murder after allegedly setting his father on fire outside a home in Sydney’s west on Thursday 

A 36-year-old man was later arrested when he was found inside a car in nearby Werrington

Authorities said the 64-year-old man was found suffering from multiple ‘distressing’ injuries including significant burns

Just hours after the incident, police confirmed the 36-year-old man has a criminal history and is ‘well known’ to police.

‘There appears to have been an altercation between the two parties there, following a break and enter into the premises – the front door was forced,’ St Marys Superintendent Trent King said on Thursday.

‘An accelerant appears to have been used… however there’s no further information at this stage around what actually occurred within the premises.

‘It was a really distressing scene for our first responders, and not a normal scene for anybody to be confronted with, particularly given the extent of the injuries to our victim.’

Fire and Rescue NSW attended and extinguished the blaze, which started in a blue Holden Commodore parked in the driveway before spreading to part of the house.