LA CRESCENTA (CBSLA)  — A 73-year-old hiker has been missing for more than a day near La Crescenta, officials said Sunday.

The man got separated from his group sometime Saturday, the Los Angeles County Sheriff’s Department reports.  The man and his friends were hiking a 6-mile route near La Crescenta on Mt. Waterman.

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There is growing concern for the man as it was not clear what he had in the way of provisions.

He was later identified as Eugene Jo.

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Officials called off the search Sunday evening after dark because of dangerous conditions. They planned to renew the search for the man at daylight Monday.

The search is being led by LASD, but agencies from the Antelope and San Gabriel valleys have been added to the search to aid in the hunt.

Teams were fanning out for miles in the Angeles National Forest.

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Temperatures have been favorable, say search organizers. There was no word on the hiker’s experience level.