JOHNSON CITY AUTHORITIES ARE SEARCHING FOR A SUSPECT WHO HELD UP A CITY CONVENIENCE MARKET. A BLACK MALE, BETWEEN 20 AND 25 YEARS OF AGE, ENTERED THE ROADRUNNER MARKET ON EAST UNAKA AVENUE. AFTER ENTERING THE MARKET, THE SUSPECT MADE A PURCHASE, AND THEN DEMANDED THAT THE CLERK OPEN THE REGISTERS. THE CLERK COMPLIED AFTER SEEING WHAT WAS BELIEVED TO BE A WEAPON. THE SUSPECT THEN FLED ON FOOT WITH AN UNDERTERMINED AMOUNT OF CASH. ANYONE WITH ANY INFORMATION IS ASKED TO CONTACT THE JOHNSON CITY POLICE DEPARTMENT.