Talking to APP, the spokesman said that the flights disrupted allegedly by the pilots included the Islamabad-Bangkok PK-892, Islamabad-Amsterdam PK-737 with a delay of 4 hours departure while another Islamabad-Karachi PK 301 delayed by about two hours.

Various associations of pilots, engineers and other staff are protesting over what they claim an agreement between PIA and Turkish Airlines but denied by the PIA.

"We have not yet signed any agreement with the Turkish Airlines and all allegations are baseless," said the spokesman.

"Talks are underway with the representatives of various associations of the national carrier to resolve any misunderstanding whatsoever," he added.