KARACHI  - The Pakistan International Airlines expressed grief over the plane crash on Friday. In a statement, a PIA spokesman expressed sympathies with the affected families. He said the PIA activated its Emergency Response Centre (ERC) to help the bereaved families. ERC numbers are 021-99242360, 021-99242336 and 021- 99242254. Help counters have also been established to assist the affected families at Karachi and Islamabad airports.