Police are appealing for witnesses following an armed robbery on the Central Coast last night.

About 6.50pm (Sunday 4 February 2018), police have been told a man armed with a serrated knife entered a tobacconist store on the corner of the Pacific Highway and Kiwwara Avenue, Wyoming.

He threatened a female employee with the knife before stealing cash and cigarettes.

The woman was not injured.

The man was spotted on Henry Parry Drive, North Gosford, by officers from Brisbane Water Local Area Command and a foot pursuit began.

The man was last seen running in Dunbar Way, North Gosford.

Investigators wish to speak with a man who may be able to assist with their inquiries.

He has been described as being of Caucasian appearance, aged between 40 and 45, 168cm tall, of a medium build, blond and brown short hair, stubble and missing teeth. The man was described as wearing a black hooded rain jacket and black pants with white stripes.

Anyone with information is urged to come forward.