Turkish Prime Minister Recep Tayyip Erdogan on Tuesday condemned leaked recordings of him and his son allegedly discussing how to hide large sums of money as a "vile attack" by rivals, as calls mounted for his beleaguered government to resign.
"What was done is a vile... and a treacherous attack against the prime minister of the Republic of Turkey. It will not go unpunished," Erdogan told his ruling party lawmakers in parliament.
The phone conversations, posted on YouTube, allegedly reveal Erdogan asking his son Bilal to turn millions of euros in cash stashed at several houses into "zero". The clip had received over two million hits by Tuesday afternoon
Bilal at one point can be heard saying: "There is 30 million ($41 million) euros more."
The leaked discussions, which could not be independently verified, were said to have taken place on December 17, the same day key Erdogan allies were caught up in police raids linked to a corruption investigation that has rocked the government.
In one conversation, Erdogan can supposedly be heard briefing Bilal about the raids, which saw top businessmen and the sons of former cabinet ministers detained on allegations of bribery, gold smuggling and illicit dealings with sanctions-hit Iran.
The man alleged to be Bilal is heard saying he will dispose of the money "in the dark".
The premier's office said the wiretapped conversations were fabricated and vowed to take legal action against those behind "this dirty setup".
"The recordings... are the product of an immoral montage and completely untrue," Erdogan's office said in a statement late on Monday after the material was leaked online.
Erdogan has come under intense pressure since the corruption scandal erupted, throwing up the biggest challenge yet to his 11 years in power ahead of key local elections in March.
He has blamed his ally-turned-rival, US-based Muslim cleric Fethullah Gulen, for instigating the graft probe, accusing him of seeking to create "a parallel state" in Turkey.
The leaked recordings appear to be the latest fallout from their feud, after the Turkish government on Monday said thousands of influential people, including the premier, cabinet ministers and journalists, had been wiretapped by Gulen supporters in the police and the judiciary.
Local media said the widespread surveillance was discovered by prosecutors who were appointed following a mass purge of the police and prosecution service in response to the corruption probe.
Erdogan, whose speech in parliament was repeatedly interrupted by party loyalists chanting "Turkey is proud of you!", said his government would not fall into traps set by rivals.
"We are not scared of anyone, any country... We are not scared of any traitor," he said.
An Ankara prosecutor's office has launched an investigation into the recordings, the Hurriyet newspaper reported.
But the controversy prompted fresh calls from the opposition for the government's resignation.
"The government has lost its legitimacy... and must resign immediately," Haluk Koc, a spokesman for the main opposition Republican People's Party (CHP), told a news conference late Monday.
CHP leader Kemal Kilicdaroglu, who played the recordings to his party's lawmakers in the parliament Tuesday, called the prime minister "prime thief".
Devlet Bahceli, leader of the Nationalist Movement Party (MHP), said the alleged recordings were "dazzling", and demanded that the prime minister be brought to justice.
The political tensions of the past months have battered Turkey's financial markets, with the lira and stocks tumbling.
The lira stood at 2.2027 to the dollar and 3.0300 to the euro on Tuesday. The Istanbul stock exchange BIST 100 declined by 2.88 percent to reach 62,340.22 points.
Last month, Erdogan rejected allegations that his son was involved in the corruption scandal.