A man was fined $1000 for breaching Covid-19 travel restrictions, and remains under investigation following allegations of an alleged second offence.

The fine was issued after he flew from Sydney to Ballina on July 7, despite the state capital remaining in lockdown in order to prevent the current Covid-19 outbreak from spreading to other areas.

In a statement released last week, NSW Police revealed a 46-year-old man was issued with a Penalty Infringement Notice by officers from the Richmond Police District after he travelled from metropolitan Sydney to Ballina.

Travel outside of Greater Sydney, where the man resides, is currently prohibited as part of the lockdown unless an exemption is granted.

He is also being investigated by NSW Police for a second alleged Covid-19 breach in Yamba on July 14.