The revelation came, when local police officers in the West African country arrested a member of the network for robbery, Lebanese broadcaster Al-Manar reported on Wednesday, citing Mauritanian sources.
According to the report, the man has been identified as a Fares al-Banna.
While searching his house, the police found handwritten letters to the United Arab Emirates ambassador in Mauritania, in which al-Banna had confessed to being a spy hired by the Israeli spy agency, Mossad.
The Emirati ambassador has, however, reportedly dismissed any form of communication with al-Banna.
In other letters, he had also confessed to having been involved in the assassination of the senior Hamas official, Mahmoud al-Mabhouh, who was killed on January 19, 2010 in Dubai. Dubai’s police have said evidence confirms Mossad’s role in the targeted killing.