REGIONAL Investigation Unit detectives are seeking public assistance about an armed robbery in Burswood in early March. About 10.40pm on March 2, a man entered a business on Teddington Road, armed with what is believed to be a syringe, and demanded cash. After being giving an amount of cash the man left the store. He is described as fair-skinned, about 170cm tall with a medium build, a balding shaved head and tattoos across his chest. He was wearing a black jacket, dark pants, boots, gloves and sunglasses. Anyone with information is asked to call Crime Stoppers on 1800 333 000 or report online at www.crimestopperswa.com.au.