KARACHI Another threat to blow up Sindh Assemblys building was received on Wednesday, however, the building was declared safe and cleared after a three-hour long checking by law enforcement agencies. According to police, an unidentified caller called 15 and threatened to blow up the Sindh Assembly between 10 to 11 am on Wednesday. Soon after the call, members of the law-enforcement agencies evacuated the building. The bomb disposal squad later cleared the building after a thorough checking. It is pertinent to mention that this kind of threat has been received for the second time in the past few days.