An explosion caused no casualties but panic Friday in a downtown area of Quetta, police and witnesses said. The roadside blast went off in a trash box near a hospital in Quetta, police said. A bomb disposal squad of the police rushed to the site. Iqbal Hussain, a local resident, told Xinhua that he heard a loud explosion in the city but not sure about the location. No one was hurt in the blast, but it was aimed at creating panic in the city, police said.