A Rathlin pensioner has threatened to go on hunger strike after claiming he was stopped from travelling to the mainland to buy food.
Police were called over the dispute involving the island's ferry.
Bertie Currie (76), who has lived on Rathlin from birth, was spoken to by police after he attempted to travel on the ferry to Ballycastle on Tuesday morning.
He had also attempted to make the journey on Monday.
The PSNI confirmed the incident, which was reported by the Causeway Coast Community news website.
"One man was spoken to by officers and a file will be submitted to the Public Prosecution Service following the incident," the PSNI said.
Speaking to the Belfast Telegraph Mr Currie, who lives alone, described how he was spoken to by officers and he left the ferry, having been informed he had allegedly been causing an "obstruction".
He claimed that with the current lockdown restrictions, living on Rathlin had become akin to being on Alcatraz, the infamous former island prison in San Francisco Bay.
He said that he had been on the ferry because he was "completely out of food".
He explained: "I said to the police: 'How do you expect me to get food?'. They said: 'Take a private boat'.
"The only thing is that councils have the harbours officially closed."
Mr Currie claimed the ferry has been operating for passengers on an emergency and essential travel only-basis.
He said these restrictions were due to be lifted from Monday - albeit with reduced passenger numbers - only for them to be reinstated.
He stressed that while he can buy food on the island, he wanted to visit a supermarket on the mainland.
"I wouldn't die of hunger but I've got to make a protest. No matter what part of Britain you are in, you've been able to go to the shop, even at the very start (of the lockdown)," he said.
"I've my own places for shopping. Now I'm thinking I'm going to have to do a hunger strike - I'll sit on the harbour. That is the last resort, but what else can I do?"
He also insisted he wanted to be prosecuted, because he believed he did not do anything unlawful.
"I want it to go to court... who has the authority to tell me that I can't leave the place I was born? I would not mind if it was law. I've been a law-abiding citizen for the last 70-odd years.
"No country should operate under conditions like that."
Mr Currie added that he is more than happy to adhere to social distancing and taking precautions.
"I don't want the virus. I was sitting on the ferry with my gloves and mask on," he added.
He fears he will have no choice but to protest the restrictions if nothing is "sorted".
"I fear the nearest we could be is Alcatraz - I can't get off this island," he said.
In response Rathlin Island Ferry Ltd confirmed normal services had been due to resume with reduced passenger numbers, but were subsequently kept to essential and emergency passenger journeys only.
The company also referred queries to the Department for Infrastructure (DfI), which provides funding for the ferry service.
The DfI had not responded to a request for comment at the time of going to press.