The directives have been issued in the light of intelligence that terrorists were planning to target the Sindh High Court, Sindh Assembly, Empress Market, Zainab Market, markets along M A Jinnah Road and restaurants at Do Darya in very near future.
An alert had been issued by the Home Department to the authorities concerned to take stringent security measures.
The law enforcement agencies and intelligence had been directed to check vehicles entering into the city, home department sources said.