A second Australian lawmaker has been targeted days after Independent MP Helen Haines was critically injured in an alleged car attack .

Police allege a 56-year-old man entered Western Australian state government minister Hannah Beazley’s electorate office in suburban Perth on Wednesday, brandishing nunchucks and making verbal threats. Beazley wasn't in the office at the time.

Nunchucks are a weapon used in martial arts consisting of two sticks or rods connected by a rope or chain.

The man was detained and charged with being armed in a way that may cause fear and with threatening to perform an unlawful act.

He spent the night in police custody and will appear in a Perth court later on Thursday.

Western Australian state government minister Hannah Beazley (AAP)

There was no allegation that the man’s behaviour was connected to the driver who hit federal lawmaker Helen Haines with his car in the east coast state of Victoria on Monday; however, the two incidents have heightened concerns about security in a…