World Bulletin / News Desk

A court in the Turkish capital, Ankara, ordered Thursday the arrest of at least four people and the release of seven others out of eleven recently held over alleged illegal wiretapping operations.

All those held were from the country's Telecommunications Directorate, or TIB.

On Wednesday, police took 26 suspects into custody in the operation; warrants were issued for 11 of them.

Operations started after it was confirmed that encrypted phones belonging to senior Turkish leaders had been compromised.

Those affected include President Recep Tayyip Erdogan, Prime Minister Ahmet Davutoglu, Turkey's Supreme Court head Hasim Kilic, the chief of General Staff Necdet Ozel and Deputy Prime Ministers Bulent Arinc and Ali Babacan.

Phones belonging to other senior figures such as Interior Minister Efkan Ala, Energy Minister Taner Yildiz, head of the country's top spy agency Hakan Fidan plus members of the National Security Council are also thought to have been wiretapped.

In total, 363 incidents of illegal wiretapping of the aforementioned names have been confirmed, most of which were carried out between Dec. 17-25, 2013, when an anti-graft probe targeted a number of high-profile figures, including the sons of three former government ministers and leading Turkish businessmen.