ISLAMABAD: The Interior Ministry has launched an investigation against officials of the Immigration and Passport Department for allegedly charging visa fees from foreign rescue workers. The foreign workers arrived in Pakistan to help the local agencies in rescue operations after a devastating earthquake hit the country on October 8. On the instructions of the Interior Ministry, the director general for immigration has summoned four officials of the department.Syed Kaleem Imam, the FIA 's immigration cell deputy director, said the cell was authorised to give landing permit to foreign aid workers on the directives of the Interior Ministry, while the Immigration and Passport Department had issued visas according to standard government policies by charging $45. Four officials of the department have allegedly received visa fee from German aid workers. Imam said a control room had been set up at Islamabad International Airport to monitor relief activities.