Pakistan, Oct. 10 -- Pakistan International Airlines (PIA) has temporarily suspended its flight operations to Riyadh in view of the situation in the Middle East, the airline's spokesperson said on Friday. The airline advised passengers to contact its call centre at 111-786-786 to confirm the latest status of their flights before leaving for the airport. PIA apologised for the inconvenience caused to passengers due to the suspension. The development comes a day after Yemen's Houthis escalated their campaign of strikes against Saudi Arabia, trying to shut down the kingdom's airspace and oil facilities with missile fire that has killed three people this week. The group said it had struck Riyadh airport, where witnesses saw smoke billowing fr...