"When the lieutenant turned around and investigated, he saw the two bodies laying on the ground. He called paramedics, and (the men) were pronounced dead at the scene," said Glendora police Capt. Tim Stabb.
Investigators said the stabbing victims were homeless. One body was discovered on the sidewalk and the other was under an awning at a car wash, next to his wheelchair.
Neighbor Dennis Heffernan said the man with the wheelchair was known as "John."
"I used to talk to him all the time," Heffernan said. "I would give him like five bucks every once in a while, and I just saw him the other day over at the bus stop."
Police said there are homeless encampments nearby, and some transients sleep outside the car wash at night.
"We have spoken with the owner of the car wash. He does know that during closed business hours that homeless people tend to spend the night, and he's never complained to us and tried to shoo them away," said Stabb.
Why somebody would kill both men is unknown. The last time there was a murder in Glendora was in April 2009. News of the stabbings has stunned residents and business owners.
"We never have anything. If we hear sirens, then there's got to be something," said Big O Tires employee Tareq Nasrallah. "But it's a wonderful community, so this is a sad situation."
No arrests have been made, and no suspect information has been released.
The Los Angeles County Sheriff's Department is helping Glendora police with the investigation. Detectives are checking with neighboring business to see if there is any surveillance video that captured the crime.
Anyone with information about this case was asked to contact the Los Angeles County Sheriff's Department's Homicide Bureau at (323) 890-5500.