Family and police are becoming increasingly concerned about the disappearance of a young Melbourne man.

Joshua Bishop, a 23-year-old from Sunbury, has not been seen for 10 days and he has not used his phone or accessed his bank accounts since, Victoria Police said.

He was last seen by his housemate leaving home about 9.30pm on May 27, and was reported missing by his mother, Kristie, two days later.

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“His disappearance is incredibly out of character,” acting detective sergeant Matthew Wilson-Hawe said.

Police were able to track Bishop’s mobile phone to a park in Broadmeadows, on a digital trace from May 27.

A “significant” search of the park on June 4 found no further evidence of Bishop, police said.

His white Toyota Corolla was located further south on Ridley St at Albion on the same day.

Bishop’s “associates” told police they thought the car had been stolen from him.

“This was not reported to police,” Victoria Police said.

“At this time, the circumstances of Joshua’s disappearance are unclear and police have not been able to rule out that it may be suspicious.

“Investigators and family are increasingly concerned given the passage of time with no contact from Joshua.”

While police say Bishop is not known to them, they are investigating whether any criminal activity may be involved.

Bishop’s parents made an emotional plea on Friday.

“We want him to know we love him, we’re here for him. We just want him to be safe,” his father Travis said, struggling to hold back tears.

“I don’t know how people go through this.”

His mother Kristie said they had a really good relationship and that his disappearance is completely out of character for him.

The family said Bishop had been dedicated to health and fitness, but started using drugs about eight weeks ago.

Earlier on Saturday, Kristie took to social media to plead for help in locating her son.

“If you have any information, no matter how small, please messenger me,” she wrote.

“Please share this post to help us bring Josh home safely. Every share counts!”

Bishop was last seen wearing a black singlet and tracksuit pants.

He is Caucasian and described as being of average build with short blonde hair and blue eyes.

He has a sleeve tattoo on his left arm, as well as a tattoo on his right leg that wraps around the back.

Police have appealed to Bishop to make contact if he becomes aware of their public appeal.

But investigators are also very keen to speak with anyone who has information about Bishop’s whereabouts after May 27.

“At this stage, we simply don’t know what has happened to him,” Wilson-Hawe said.

“The more time passes without us hearing Joshua or getting any information about his whereabouts, the more we believe his disappearance is likely to be suspicious.

“If there is anyone out there with information about Joshua, whether they have heard from him in that time since he was last seen or they have information about his current whereabouts, then we are keen to speak to them.”

Investigations are ongoing and anyone with information should contact crime Stoppers.