(CNN) A New York Police Department detective was shot and killed Tuesday, and a sergeant was hit in the leg, after they responded to a reported robbery at a cell phone store in the borough of Queens, city officials said.

"Once again our hearts are broken in the NYPD," Commissioner James P. O'Neill said. It was an apparent incident of friendly fire, he said. As the two officers went into the store, a suspect came out of a back room with a replica handgun. The detective and sergeant fired, and as they were leaving the store, the detective was apparently shot by uniformed officers. Brian Simonsen, 42 years old and a 19-year-veteran of the department, was killed, police said. O'Neill and the Mayor Bill de Blasio met with the family at a hospital. Read More "It was heartbreaking to see," de Blasio said. "The shock that they are feeling was so painful to see." "Make no mistake about it, friendly fire aside, it's because of the actions of the suspect that Detective Simonsen is dead," O'Neill added. Our hearts are broken again, because a career criminal put lives in jeopardy. Det. Brian Simonsen, 42, was a 19-year-veteran of the #NYPD . He lost his life fighting crime & keeping safe all the people we serve. The sympathies of all New Yorkers are with his family & colleagues. https://t.co/P0V1VCZPZV

— Commissioner O'Neill (@NYPDONeill) February 13, 2019 The suspect, described by O'Neill as a 27-year-old career criminal, was shot multiple times and is listed as stable, O'Neill said. O'Neill said a sergeant, who has been on the force for 8 and a half years, was also wounded and is in stable condition. Before Tuesday, eight US police officers had been killed by firearms while on duty in 2019, according to the National Law Enforcement Officers Memorial Fund website.