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Shocking Scenes: Police Walked In As A Man Was Trying To Kill A Little Girl

Mark Leo Gregory Gago, 42, killed his parents, his girlfriend and their infant daughter on Saturday night in the rural home near Woodburn before deputies shot him, the Clackamas County Sheriff's Office said.

KOIN-TV reports the victims were identified as nine-month-old Olivia Lynn Rose Gago, 31-year-old Shaina Sweitzer, 64-year-old Pamela Denise Bremer and 66-year-old Jerry William Bremer.

The victims were not shot, The Oregonian reported.

Mark Leo Gregory Gago, 42. Image: Clackamas, Oregon County Sheriff's Department.

"We're not sure what was used at this time," Sheriff's Office Sergeant Brian Jensen told reporters near the scene Sunday.

"I've been told that there were numerous weapons, swords, things of that nature in the residence. The investigators are trying to determine what exactly was used to kill each person."

Neighbour Alice Burch told CBS affiliate KOIN-TV that one of the weapons used was an axe.

READ MORE: How A 13-Year-old Escaped The Kidnapper Who Allegedly Killed Her Parents 

"It was like an axe with a hammer head on it, a long-handled type hatchet hammer," Burch said.

"He started whaling on her with whatever he was using."

Sergeant Brian Jensen said the causes of death will be investigated.

The home is about 32 kilometres south of Portland and northeast of the city of Woodburn.