A Saudi official says police have detained 10 more members of an alleged Iranian spy ring — eight Saudis, one Lebanese and one Turkish national.

Interior Ministry spokesman Maj. Gen. Mansour al-Turki said in a statement Tuesday that investigations in the March arrest of 18 alleged spies had led to the new arrests.

The ministry said on March 19 that security authorities had arrested 18 people suspected of espionage, including an Iranian, a Lebanese and 16 Saudis. The Lebanese was released for lack of evidence. Iran denied any involvement in the espionage.

The ministry said earlier that material evidence and confessions from the detainees proved that members of the group had received money from the Islamic Republic of Iran for information on vital locations in the kingdom.