Airports on red alert

Pakistani officials placed the country's airports on "red alert" on 25 September 2008, after an anonymous caller telephoned the Pakistan International Airlines (PIA) office in Karachi, threatening that there would be a bombing at Benazir Bhutto International Airport (OPRN/ISB) in Islamabad at 1240 local time (0740 UTC). Authorities evacuated parts of the airport, including lounges and the parking lot, immediately after receiving the threat. Officials searched the facility and found nothing suspicious, but heightened security remains in place. Authorities have tightened restrictions on access to airports, but it is not known what other measures the "red alert" status entails.