All flights in and out of Pakistan's Karachi airport have been suspended following an attack on a nearby academy run by the airport security force, a civil aviation spokesman said on Tuesday.
"Flights at Karachi airport have been suspended until further notice," the spokesman for Pakistan's Civil Aviation Authority said by telephone.
Gunfire rang out outside the academy, which is run by the Pakistani unit tasked with protecting Karachi airport, and at least four ambulances were seen rushing to the scene, a Reuters reporter said.
Pakistani television reported that three militants had been surrounded by security forces at the academy, but no other details were immediately available.
Pakistani forces cordoned off the area and searched the neighborhood for militants, a Reuters reporter at the scene said.
"The shooting came from a nearby shanty settlement towards the ASF (Airport Security Force) academy," said a senior police officer. "Police are launching a search operation now."
On Sunday, militants stormed Pakistan's biggest airport and at least 27 people were killed in a night-long battle at one of the country's most high-profile targets.
The assault on Jinnah International Airport in Karachi, Pakistan's sprawling commercial hub of 18 million people, took place as Prime Minister Nawaz Sharif's government tries to engage Taliban militants in talks to end years of fighting.
Want to enjoy 'Zen' reading - with no ads and just the article? Subscribe todaySubscribe now