Police are appealing for information after two armed robberies occurred at Newcastle today.

About 11.30am (Sunday 3 April 2016), a man walked into a business on Belford Street, Broadmeadow, and allegedly threatened a 41-year-old male employee with a knife, demanding money.

The employee complied and ran away. The man left the store shortly afterwards with a sum of cash.

About 12.30pm (Sunday 3 April 2016), a man entered a convenience store on Wharf Road, Newcastle. The man allegedly threatened a 23-year-old male worker and demanded money.

A sum of cash was handed to the man and he left the store, running north towards Hunter Street.

Police from Newcastle City Local Area Command were called to both incidents and commenced investigations.

No one was injured in either of the robberies.

Detectives suspect both incidents are linked and would like to speak to a man who may be able to assist with their inquiries.

The man is described as being of Caucasian appearance, in his early to mid 50s, about 175-180cm tall with a solid build.

In the first incident, the man was seen wearing a white t-shirt and black glasses.

In the second incident, the man was seen wearing sunglasses, a black t-shirt and cream shorts.