WALNUT (CBSLA.com) — A man underwent surgery Saturday morning after he suffered a severe arm injury following a stabbing in Walnut.

The stabbing was reported Friday around 11:25 p.m. at a park on Suzanne Road, Sheriff’s deputies said.

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The victim was stabbed in his left arm and had to be airlifted to the hospital where he is in critical condition.

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Deputies have yet to say whether they believe the stabbing was gang-related.

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No information has been released about the suspect.