Search teams in Turkey on Wednesday recovered the cockpit voice and flight data recorders from a jet crash that killed eight people, including western Libya’s military chief, while efforts to retrieve the victims’ remains were still underway, Turkey’s interior minister said.

The private jet carrying Gen. Muhammad Ali Ahmad al-Haddad, four other military officials and three crew members crashed on Tuesday, after taking off from Turkey’s capital, Ankara, killing everyone on board. Libyan officials said that the cause of the crash was a technical malfunction on the plane, AP reported. 

The high-level Libyan delegation was on its way back to Tripoli after holding defense talks in Ankara aimed at boosting military cooperation between the two countries.

Turkish Interior Minister Ali Yerlikaya told journalists at the site of the crash that wreckage was scattered across an area covering three square kilometers (more than a square mile), complicating recovery efforts. Authorities from the Turkish forensic medicine authority were working to recover and identify the remains, he said.

A 22-person delegation — including five family members — arrived from Libya early on Wednesday to assist in the investigation, he said.

Libya plunged into chaos after the country’s 2011 uprising toppled and killed longtime dictator Moammar Gadhafi. The country split, with rival administrations in the east and west, backed by an array of rogue militias and foreign governments.

Turkey has been allied with Libya’s government in the west, but has recently taken steps to improve ties with the eastern-based government as well.

Tuesday’s visit by the Libyan delegation came a day after Turkey’s parliament approved to extend the mandate of Turkish troops serving in Libya for two years.

Turkey deployed troops following a 2019 security and military cooperation agreement that was reached between Ankara and the Tripoli-based government.