Police are investigating the attempted armed robbery of a taxi driver at Mackay last evening.

Shortly before 10pm the male driver pulled over in Kenilworth Street to pick up a fare.

A man, armed with a syringe, entered the cab and demanded cash.

The driver refused and the man fled empty handed.

The man is described as approximately 180cms tall with a slim build. He was wearing a brown jumper and had his face covered.

No one was injured and police investigations are continuing

Anyone with information which could assist police with their investigations should contact Crime Stoppers anonymously via 1800 333 000 or crimestoppers.com.au 24hrs a day.

Crime Stoppers is a charitable community volunteer organisation working in partnership with the Queensland Police Service.