One of two 18-yr-old Muslim men charged with starting a grassfire in NSW, Australia, laughed outside court today.

Fadi and Abraham Zreika sparked a grass fire at Bright Park, Guildford, on December 22.

In November, ISIS encouraged followers to “ignite fires” as a means of “waging jihad”, according to the Middle East Media Research Institute.

Police allege the two men ran away when their fireworks sparked several small grassfires that spread rapidly in sudden winds.

The Rural Fire Service managed to contain the fires before they got out of control.

Police arrested both men at a fast-food restaurant in Merrylands.

The men faced court today on multiple charges such as negligent handling of explosives, refusing to disclose identity and custody of a knife in a public place.

They did not enter pleas for the string of offences.

One of the accused left the Parramatta Local Court laughing.

The matter will return on January 21.

Meanwhile, know the truth: