At least four people were killed and 30 others injured when a loud explosion took place inside the judicial complex in Peshawar on Monday, Pakistan’s (Dunya) News Agency reported today.According to an eyewitness, the explosion took place after terrorists and police exchanged fire.Pakistani Security forces have cordoned off the area and people are told to stay away from the scene.The injured people including several lawyers have been shifted to the Hospital.“Some attackers are still inside the building and have possibly taken some people hostage,” provincial information minister said.The gates of the building have been sealed and a search operation within the judicial complex has begun.