Lebanon's internal security service arrested a senior reserve officer on suspicion he collaborated with Israel, Lebanese newspaper al-Akhbar reported on Tuesday.
According to the report the man, Adib A., admitted in his interrogation he used to meet regularly with his Israeli handlers in Europe.
A security official told the newspaper that the officer confessed in his questioning to having cooperated with Israel's' intelligence branches for over 10 years by collecting information.
He however denied any involvement in operational activities, such as assassinations or military attacks, inside Lebanon.
A senior security service source described A. as a "big fish" and estimated that his interrogation could yield sensitive and valuable information.
The officer had been under surveillance for the last three months, along with a number of other individuals suspected of collaborating with Israel, the security official told the paper.
The investigation eventually focused on A. from the southern Lebanese village of Ramish. Last Saturday he was arrested on the orders of the general prosecution in Lebanon.
The man's wife was detained shortly after his arrest, and divulged information that her husband refused to give.
Al-Akhbar reported that A. had served on the Lebanese general security service until 1998, when he retired and opened a private practice that is believed to have served as a cover for his operations.