Italy's tax police have searched the offices of Milan's city council as part of an investigation into the sale of the San Siro stadium, home to AC Milan and Inter Milan. The 100-year-old arena was sold by the city council last year to the two Serie A clubs, who plan to demolish it and replace it with a new stadium. Around a dozen people are under investigation on suspicion of bid-rigging and leaking official secrets. The Guardia di Finanza police also seized computers and mobile phones.