Pakistan International Airlines chairman Arshad Malik has said the plane's pilot reported he was experiencing technical difficulties before the crash.
“It is a very sad incident and I am going to Karachi," he said.
"The last voice we heard of the [c]aptain was [that] we have a technical problem. He said this from final approach, he was told we are ready for landing, both strips are free and you can land but [he] decided to go-round.
"What was the reason, what was the tactical issue? We will investigate."