Police have been searching for them since with specialist units joining in. The search has been focused on the river banks this week but the police revealed yesterday that the twins had told their landlord they were moving out.
Their brother Jozsef has now revealed the family back in Hungary had no idea that was their intention and there was no mention of it when they spoke to their mum on the Saturday before they went missing.
He also revealed they had no money issues and they are at a loss to explain what has happened with them.
Speaking to the BBC, Mr Huszti said: “We don’t understand this whole thing.
“That they wrote a message to their landlady, that they wanted to immediately end their tenancy agreement. We didn’t have any information about that.
“So that’s the strange thing, that the girls didn’t tell us anything about that.
“They never mentioned any such plan.
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“Even when my mother spoke to them on the Saturday, they didn’t mention anything about it, that they had any plan to move out.”
Speaking yesterday, Superintendent David Howieson said there was no indication of any criminality being involved in their disappearance.
He said: “We’re trying to remain open minded in terms of what the wider circumstances may have been.
“What we know is that the behaviour of the sisters in the morning on which they disappeared is very out of character.
“We don’t really understand why they seem to have left their home address and walked to this area in a fairly direct line before the CCTV footage of them is exhausted.
(Image: Police Scotland)
“One of our theories has to be that they’ve entered the water for reasons unknown, and that’s why so much of our search activity is focused on the river, the river bank, and the harbour itself, but we’re not ruling out the fact that they may have left this area by means that we haven’t identified yet.
“We’re remaining open minded, but we’re seven days into an inquiry with an enormous amount of inquiry carried out, and at the moment, there’s nothing we’ve found that suggests criminality or suspicious circumstances.
“They may have come to harm. That has to be a theory in terms of access to the river. But what we don’t have is any indication that a third party has been involved.”
“There was an indication from the person from whom they rent a flat who had concerns that they left the flat and indicated they intended to move.
“So inquiries were carried out at the flat, and the circumstances that were found led to concern around their whereabouts, which was then important to the police.”