NSW Premier Gladys Berejikilian said that she is struggling to sleep due to the number of mystery coronavirus cases in NSW that continue to grow.

She appeared on Sunrise to urge people living in hot spot suburbs to get tested for COVID-19 if they're experiencing symptoms. 

“We’re concerned that there is community transmission we haven’t picked up,” she said on Friday.

“We’re doing well, we’re holding our own, but when every week you get a couple of unknown cases and they can’t be linked, you do worry.”

"That's what bothers us the most and keeps me awake at night"

NSW Premier @GladysB says she's concerned about the growing number of mystery coronavirus cases in her state. pic.twitter.com/2lQ2U3jLZG

— Sunrise (@sunriseon7) August 13, 2020

Health officials are concerned as NSW recorded 12 new cases on Wednesday and three of the cases acquired the virus from an unknown source.

“What it does tell us is that there is the disease circulating, especially in Western and South-Western Sydney,” Berejiklian explained.

She urged people to be cautious.

“The health advice we got earlier this week says you’re more likely to get the disease from someone you know than someone you don’t know,” she explained.

“If you’re out socialising, you’re welcoming people into your home or you’re going to church or mosque, then you’re more likely to transfer or get the disease.”

She also begged NSW citizens to wear a mask in environments where social distancing was not guaranteed.

“I have been wearing a mask as I’ve been doing my grocery shopping and I urge everybody else to as well,” she said.