A pigeon has been arrested by police in India on suspicion of being a spy from Pakistan.
The bird was seized on Thursday after being spotted carrying a "stamped message" on its body.
The message was written partly in Urdu, the official language of Pakistan. It also contained a Pakistani phone number, according to reports.
A jetliner carrying 98 people crashed in Friday in a crowded neighborhood near the airport in Pakistan's port city of Karachi after an apparent engine failure during landing.
Officials said there were at least two survivors from the plane, and it was unknown how many people on the ground were hurt, with at least five houses destroyed.
Turkey on May 22 offered condolences to Pakistan over a deadly plane crash in the early hours of the day.
"We receive the news with deep sorrow that a Pakistan International Airlines plane crashed into a residential area close to Jinnah Airport in Karachi resulting in the loss of many lives," Turkish Foreign Ministry said in a statement.
Pakistan wants to enhance its defense cooperation with Turkey, said the general manager of STM, a leading Turkish defense firm.
The firm has developed several projects for Pakistan in the last decade with a special focus on its navy, Murat İkinci said.
It has pioneered many projects for Turkey and its projects in Pakistan have created export opportunities for many companies.
Turkey's president on Feb. 14 attended a joint session of Turkey-Pakistan Business Forum in the Pakistani capital of Islamabad.
Turkish President Recep Tayyip Erdogan arrived in Pakistan's capital Islamabad yesterday for a two-day official visit, the Anadolu Agency reported.
Prime Minister Imran Khan, along with cabinet members, welcomed the Turkish president, accompanied by a high-level delegation to PAF Base Nur Khan - a military base used for foreign government officials.