Buildings were torn apart after the plane’s wings sliced through rooftops, sending flames and plumes of smoke into the air.
Khan said three people on the ground were injured, saying for the first time that a young girl later died.
A full report is expected to be released at the end of the year, with advanced analysis of the aircraft wreckage still ongoing.
Pakistan has a chequered military and civilian aviation safety record, with frequent plane and helicopter crashes over the years.
In 2016, a PIA plane burst into flames after one of its two turboprop engines failed while flying from the remote north to Islamabad, killing more than 40 people.
The deadliest air disaster in Pakistan was in 2010 when an Airbus A321 operated by private airline Airblue crashed into the hills of Islamabad as it came in to land, killing all 152 people on board.
An official report blamed the accident on a confused captain and a hostile cockpit atmosphere.
PIA, one of the region’s leading airlines until the 1970s, now suffers from a sinking reputation due to frequent cancellations, delays and financial troubles.
It has been involved in numerous controversies over the years, including the jailing of a drunk pilot in Britain in 2013.