No arrests have been made in relation to the seizures.
An appeal will be made on BBC1′s Crimewatch programme this evening.
A lot of people who were in Praia da Luz at the time of the 3-year-old’s disappearance have been in touch with police since the re-enactment of her disappearance.
The agency sold a Rolex watch – that once belonged to a Limerick criminal – on the website last month.
The online auction attracted eight bids from interested buyers.
A fresh appeal for information will be made on tomorrow night’s UK Crimewatch programme.
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Police hope that analysis of mobile phone data from thousands of people who were in the Portuguese resort of Praia da Luz when the toddler disappeared could provide a new lead.
The murder, which police believe had racist motives, has remained unsolved for 16 years.
