As news of the deaths of two Pakistan International Airlines (PIA) employees spread on Tuesday evening, the national flag carrier’s flight operations across the country began shutting down in solidarity with the protesters, officials said.While flight operations remained on schedule Tuesday morning despite the PIA union’s call for a complete strike against privatisation of the airline, the situation changed drastically after employees protesting outside the Karachi Airport clashed with law enforcement personnel, resulting in the deaths of two PIA employees.PIA flight operations were suspended around 4pm at Lahore’s Allama Iqbal International Airport, Islamabad’s Benazir Bhutto International Airport, Peshawar’s Bacha Khan International Airport and the Quetta Airport, officials confirmed. The status of PIA flights at Karachi was already uncertain due to the violent protests.PIA Lahore spokesman Athar Awan said flight operations had been halted after two PIA employees were killed in clashes with forces. PIA’s employees later gathered outside the Lahore Airport to register their protest, DawnNews reported.