Erdogan's son - 33 year-old Bilal Erdogan- gave testimony to prosecutors in Istanbul on Feb. 5 and is determined to clear his name, lawyer Ahmet Ozel said in a written statement to the state-run Anadolu Agency.

In December, the prime minister sacked four government ministers allegedly implicated in a vast corruption scandal after authorities arrested two dozen people, including the sons of two government ministers and a state-owned bank chief, on bribery charges.

The government then moved to replace prosecutors and police involved in the probe. That reportedly stalled a second wave of arrests and the questioning of Erdogan's son, and sparked accusations that the government was trying to suppress graft probes.

Erdogan insists the investigations were orchestrated by followers of a moderate Islamic movement led by U.S.-based cleric Fethullah Gulen, and are aimed at damaging his government ahead of local elections in March and presidential elections in August. Gulen denies involvement in the probes.

Bilal Erdogan's testimony comes after the government replaced thousands of police officials and prosecutors nationwide who were believed to sympathize with the Gulen movement.

The main opposition People's Republican Party has claimed that the educational foundation, Turgev, accepted bribes - disguised as donations - from businessmen who were granted lucrative public contracts.

Ozel said Bilal Erdogan was the victim of a political "lynching" campaign.

NJF/NJF