The New South Wales Government will assemble an "expert panel" to advise it on how to make music festivals safer, after two people died at an event at the weekend.

Key points: Two people died from suspected drug overdoses at the 10th Australian Defqon festival on the weekend

Two people died from suspected drug overdoses at the 10th Australian Defqon festival on the weekend The NSW Government has created an expert panel to advise them on how to make dance festivals safer

The NSW Government has created an expert panel to advise them on how to make dance festivals safer Premier Gladys Berejiklian says her government stands against pill testing and maintains a "zero tolerance policy"

However, Premier Gladys Berejiklian says the panel will not be looking at the option of pill testing because the Government doesn't support it.

Two people who attended the Defqon festival in Penrith on Sunday died from suspected drug overdoses.

Ms Berejiklian said the hardstyle music event, which drew a crowd of over 30,000, "did not meet the safety requirements which is expected of some events".

She said the panel would comprise of Police Commissioner Mick Fuller, chief medical officer Kerry Chant and Independent Liquor Gaming Authority chairperson Philip Crawford.

"Music festivals, dance festivals, are an important part of our culture — we don't want anybody to stop having fun at these events," she said.

"I also want to reiterate my government's zero tolerance to drugs and also the fact we do not support pill testing."

Ms Berejiklian said people had to respect the law.

"I do worry about the slippery slope that pill testing provides," she said.

Last week, Ms Berejiklian called Defqon an "unsafe event" and said "I'll be doing everything I can to make sure it [the event] never happens again".

Sorry, this video has expired Two people have died in suspected overdoses at Defqon music festival

'Drugs are embedded in festival culture'

Festival attendees told the ABC the Government should reconsider.

Describing himself as a sober raver, 20-year-old Vincent Collins said: "No matter what the event is, there's always going to be those few who are going to do drugs."

"It's inevitable — so why not at least make it less of a death sentence for those people in question?" he said.

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Breanna Thompson, 19, said: "People will always find a way to get drugs into festivals and may as well have them tested…[to] prevent more people from dying."

"People take their own risk when taking drugs but that doesn't mean the rest of us should suffer.

"It breaks my heart to even imagine not having Defqon in Australia ever again."

Pill testing was trialled in Australia for the first time earlier this year at the Groovin the Moo festival in Canberra, and it was discovered that lethal ingredients were found in some of the 85 substances that were tested.

The testing was carried out by the Safety and Testing Advisory Service at Festivals and Events.

NSW Greems MP David Shoebridge said: "Most politicians, whatever party they are from, are scared to admit that the war on drugs is unwinnable".

"Agreeing to pill testing is seen as giving in to the fact that a portion of society will always consume drugs no matter what the law says."

In 2016, electronic dance music festival Stereosonic was cancelled after the drug-related deaths of 25-year-old Sylvia Choi and 19-year-old Stefan Woodward.

However, organisers previously denied the cancellations were connected to the deaths.