The Sparks Police Department released security camera photographs of a suspect in a convenience store robbery from early Sunday. Police say the suspect went into the 7-Eleven at 250 Pyramid Way about 1 a.m. Sunday and picked up several items and started to leave without paying for them. When the clerk tried to stop him he threatened the clerk with a weapon. He left the store before police arrived. Police said the man was between 40 and 50 years old.