TRACY (CBS13) — A memorial was held Wednesday for 64-year-old Parmjit Singh, who was brutally attacked Sunday night.

The community gathered at Gretchen Talley Park Wednesday, the same place Singh was killed earlier this week.

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Authorities say Singh was out for his routine walk through the park Sunday night when he was brutally attacked and left to die.

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Police do not have any suspects at this point but are looking for a man who was caught on security camera leaving the park around the same time  Singh was attacked.

A $1,000 reward is being offered for anyone who helps identify a suspect.

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If you have any information, please call the Tracy Police Department.