Sydney man charged with running drug lab

A man's been charged after a clandestine drug lab was found at a property in Sydney's south west.

The lab was discovered when police knocked on the door of a unit in Miller on Friday afternoon.

Specialist police and fire department officers had to be called in to process the scene where a child was believed to be on the premises.

The 48-year-old man was charged with manufacturing a commercial quantity a drug and running a drug lab. He was refused bail to appear at Parramatta Local Court on Saturday.