Melrose Place star Jack Wagner's 27-year-old son Harrison found dead in a car park

Harrison Wagner, the son of General Hospital and Melrose Place actor Jack Wagner, has died. He was 27.

Harrison was found dead in a car park in Los Angeles, California on Monday morning, per Page Six.

According to a spokesperson for the Los Angeles County Department of Medical Examiner-Coroner, Harrison's cause of death is currently being investigated.

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The spokesperson says Harrison was pronounced dead at 5.14am local time on Monday morning at a parking lot in North Hollywood.

His father, 64-year-old Jack, declined to comment when Page Six contacted him.

Harrison's cause of death is unknown at the moment, but he has historically battled with addiction – though it is unclear if this was a factor in his passing.

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In July 2016, following a relapse, Harrison went missing for nearly a week, according to Jack.

"I'm going to ask those who want to share their fears, addictions & struggles to do so w me via Twitter. We can face them 2gether, I'll start," Jack wrote on Twitter at the time.

"I fear for my youngest sons safety," he tweeted minutes later. "Harrison has struggled w drugs & alcohol just as I did when I was younger. He's relapsed & is MIA 5days."

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One day later, Jack updated his Twitter followers with a message confirming he had heard from Harrison.

"Harrisons been in touch," Jack tweeted at the time. "He's 21 & in charge of his life, ty for the lv & prayers, please continue to share your struggles, it helps us all."

Jack and his wife Kristina Wagner, 59, also share a 31-year-old son, Peter Wagner. Jack is also a father to daughter Kerry Wagner, who was born after a one-night stand in 1998.

If you, or someone you know would like to talk to someone confidentially about addiction, contact Lifeline on 13 11 14 or visit Reach Out. In an emergency, call 000.