PHOENIX (AP) -- A man accused of fatally stabbing another employee at a downtown Phoenix restaurant last month has pleaded not guilty in the case. Maricopa County prosecutors say 23-year-old Javier Alonzo Romero entered his plea Thursday. His initial pretrial conference is scheduled for Jan. 23. Romero was arrested on suspicion of second-degree murder and aggravated assault on a police officer. Police say Romero tried to grab the gun of a police officer while being treated later at a hospital for cuts to his arm. Romero allegedly attacked another kitchen worker at the Tilted Kilt on Nov. 25. He and 26-year-old Miguel Angel Hernandez were stocking inventory before the restaurant opened that day. The motive for the stabbing remains unclear. Authorities say Hernandez was declared dead at the scene.