While the UK Customs authorities had released PIA employees who returned to Islamabad on Tuesday morning, the management took the extreme step based on its own investigation.
"We will not spare anyone. They violated the rules and were carrying things which shouldn't be with them," said a PIA official.
Read: PIA's smuggling problem deepens as three crew members detained in UK
The crew had been detained in London on Monday morning for questioning on suspicion of smuggling mobiles phones and currency just before PIA flight PK-788 was due to take off for Karachi.
Authorities had initially stopped the 14-member crew, but detained only five airhostesses and stewards.
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