Panic gripped the passengers of Pakistan International Airlines (PIA) flight PK 305 when an unknown caller told the ASF authorities about presence of bomb in the said flight, said sources in PIA. However the flight was cleared by bomb disposal squad to take off at the Allama Iqbal International Airport on Thursday evening. PIA flight PK 305 was ready to depart with 212 people on board when an anonymous call tipped off airport authorities about a bomb.