Updated

Turkey's state-run news agency says court officials have formally arrested the sons of two government ministers in a vast corruption investigation targeting allies of Prime Minister Recep Tayyip Erdogan.

The Anadolu Agency says Saturday the head of a state-owned bank, a prominent businessman and 14 other people were also formally arrested, bringing the total number of people ordered jailed pending trial in the scandal to 24. The son of a third minister and a construction magnate were freed from custody pending trial.

The private Dogan news agency said the ministers' sons and other suspects are accused of taking or facilitating bribes.

Erdogan says the corruption investigation is a "dirty operation" to unsettle his government and has vowed to go after those who have instigated it.