Obama raises concerns over China’s cyber activities

London, June 25 : US President Barack Obama has raised concerns over China’s cyber activities as the two-day talks between the nations come to an end.According to BBC, the White House said that Obama urged China to take action in order to reduce tensions.The US has accused China of hacking into government and commercial computer systems earlier.Chinese were blamed for breaching a security system, earlier this month, involving the records of four million past and present US federal employees.