July 6 (Reuters) - Taiwan smartphone maker HTC Corp reported an around 33 percent rise in second-quarter profit, it said on Tuesday.

HTC's unaudited net profit in April-June was T$8.64 billion ($268 million), the company said in a statement, without giving further details.

In the same period a year earlier, it had reported an audited net profit of T$6.5 billion.

Sales reached T$23.86 billion in June.

HTC ranks behind bigger smartphone rivals Nokia Oyj, Blackberry maker Research in Motion, iPhone maker Apple Inc and Motorola Inc in the global smartphone rankings, according to research firm IDC. (US$1=T$32.2) (Reporting by Roger Tung)