Turkish police detained about 20 people including the sons of three cabinet ministers on Tuesday as part of an investigation into alleged bribery and corruption in public tenders, local media reported. Police raided several houses in Istanbul and Ankara and took in more than 20 people -- among them the sons of the interior, economy and environment ministers. The suspects also included well-known businessmen and bureaucrats the including director general of Turkish state bank Halkbank, the private Dogan News Agency reported. The ruling Justice and Development Party (AKP), which boasts of being pro-business, has pledged to root out corruption, a chronic problem in Turkey.