( CNN ) -- A veteran detective and the murder suspect he was interviewing were killed Thursday in a shooting inside the Jackson , Mississippi , police headquarters . Detective Eric Smith , 40 , was talking with suspect Jeremy Powell , 23 , when the shots were fired , Jackson police said . Other law enforcement officers overheard the gunshots and rushed into the room , said a shaken Chris Mims , a spokesman for Mayor Harvey Johnson . They found both people dead . The incident occurred around 6 p.m. ( 7 p.m . ET ) . One hour later , the situation was contained , according to Othor Cain , a spokesman for the Hinds County Sheriff 's Department , . The Mississippi Bureau of Investigation is leading the investigation into what happened , Mims said . Jackson , a city of about 175,000 residents , is the capital of Mississippi . CNN 's AnneClaire Stapleton contributed to this report .
NEW : Two killed are Detective Eric Smith and murder suspect Jeremy Powell , police say . He was interviewing a murder suspect inside police headquarters . Detectives overheard gunshots , went into the room and found the suspect and detective dead . Mississippi Bureau of Investigation is leading the probe into what happened .