Riverside police on Monday, Oct. 13, were trying to identify and find the person who stabbed a man at the Sam’s Club on Valley Springs Parkway on Friday, Oct. 10.

Detectives were withholding a description of the suspect as they continued their investigation, said Officer Ryan Railsback, a Police Department spokesman.

The victim was expected to survive, Railsback said.

The motive for the attack, which was reported at about 4:35 p.m., remains a mystery, he said.

A cellphone video obtained by freelance news service OnScene shows two men arguing in the store. The stabbing happened outside, Railsback said.

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