Hong Kong's Independent Commission Against Corruption (ICAC) arrested Raymond and Thomas Kwok in the agency's biggest investigation since it was set up in 1974, to root out what was seen as widespread corruption in the government and police. Rafael Hui, a former No.2 official in the government, was also arrested, according to media reports. Mr Hui resigned as an independent director of insurer AIA Group late on Thursday. The arrests yesterday came just days after Hong Kong elected Beijing-loyalist Leung Chun-ying as its next leader, pledging land for cheaper public housing. Soaring property prices, the most expensive in the world, have stirred public discontent in Hong Kong. House prices almost doubled in the five years to the end of 2011, according to real estate broker Knight Frank. "This is not good for the image of Hong Kong, which used to have a high reputation for integrity," said Joseph Wong, a former senior government official and colleague of Mr Hui.