Several people including a policeman were injured when more than sixteen blasts rocked various cities of Pakistan\'s Sindh including Karachi on Wednesday, Pakistan\'s Geo TV reported. Four persons were injured when blasts targeted the ATM machines of National Bank of Hyderabad early morning. All the blasts occurred outside the National Bank branches in Hyderabad. Several people were reported injured as a result of multiple blasts. Officials of Railways administration have reached the affected area where the rescue efforts are underway, police said. At least six people including a policeman were also injured in multiple blasts who were transferred to hospital for medical treatment.