UPLAND (CBSLA) — The Angeles National Forest Service has issued an emergency order to shut down the hiking trails of Mount Baldy until the search for a missing hiker concludes or until the end of the year.

That hiker, 52-year-old Sree Mokkapati, has been missing since Sunday when he got separated from his group.

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“He’s my father, he raised me,” Shravan Mokkapati, the hiker’s son, said. “He’s more important to me than anybody in the world.”

The search for Mokkapati continued Wednesday despite challenges including a low number of rescue volunteers and rough ice and snow conditions.

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“One of the patrol ships, while they were up there today, did see a set of single tracks,” Cindy Bachman, of the San Bernardino Sheriff’s Department, said. “Unfortunately, I don’t have any good news about those tracks. They still have not located Mr. Mokkapati.”

Community members came out in force after the search concluded for the evening for a vigil in Upland to support the family and to ask that more volunteers show up in the days to come.

“I beg and I plead that we can have more certified Alpine Search and Rescue volunteers to show up and help find my dad,” the hiker’s son said.

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The search is scheduled to resume Thursday morning at sunrise.