( CNN ) -- Two police officers in Indiana were killed in separate shootings in what was a violent holiday weekend in the state . In Gary , Officer Jeffrey Westerfield , a 19-year veteran of the police department , was killed early Sunday morning while responding to a call . It was his 47th birthday , CNN affiliate WLS reported . The police department called the father of four 's death a `` senseless act of violence . '' Authorities took three men in for questioning in connection with the shooting , CNN affiliate WLS reported . A day earlier in Indianapolis , Officer Perry Renn , a 21-year veteran , was killed while responding to a call of shots fired , the city 's police department said . Renn and another officer were approaching a group of people in an alley Saturday night when a gunman shot at the officers , the department said . Police returned fire , but Renn was fatally struck in the shootout . `` This is a sad day for the IMPD family and the community as a whole , '' Police Chief Rick Hite said . The suspected gunman , 25-year-old Major Davis Jr. , was also struck but survived . Authorities expect Davis to be charged with murder . Davis ' grandmother told CNN affiliate WISH-TV , his family has had prior run-ins with police . Davis ' father died of a heart attack while in police custody when Davis was a teenager , the family said . `` He was n't a bad person . His father was killed by IMPD . That is enough to hurt a person and scar him for life , '' Davis ' grandmother , Pam Moornan , told WISH . The death of Renn capped a violent Saturday in Indianapolis , which also saw police responding to the shooting of six men and one woman in a popular bar district , Indianapolis police Lt. Chris Bailey said . One man was in critical condition , and the others suffered nonlife-threatening injuries . Police have not identified a suspect in that shooting , and the motive remains unclear . Police officer killed , 7 people shot in spate of violence in Indianapolis .
One officer was found dead in his patrol car in Gary . The other officers were taken to a hospital for treatment of minor injuries.