KKR IPO running into headwinds?

LONDON (CNNMoney.com) -- Problems in the debt markets could force private equity firm Kohlberg Kravis Roberts & Co. to postpone its initial public offering, according to a report published Friday.

The buyout firm, which filed for a $1.25 billion IPO earlier this month, could be hit hard by the troubles in the credit markets since it is still trying to complete financing for many of its deals, the Wall Street Journal said.

KKR has been at the helm of some of the biggest deals in the industry. It bought Texas utility TXU for $44 billion and First Data Corp. for $28 billion. Many of its deals still need to be financed at a time when conditions are growing tougher in the debt markets.

Underwriters of the deal told the newspaper there's hasn't been any change in timing for the deal. A source close to KKR told the Journal the IPO should hit the market in late September.