An Azerbaijani passenger plane with 67 people on board crashed in the Kazakh city of Aktau on Wednesday, according to officials, adding that more than 30 people are believed to be dead.

Kazakhstan’s Emergencies Ministry said in a statement to Telegram that there were at least 32 survivors, with five crew members among those on board. At least 29 have been hospitalized, the ministry told Russian state news agency RIA Novosti.

Russian news agency Interfax quoted medical workers as saying that four bodies had been recovered, and emergency workers at the scene said both pilots were believed to have died in the crash, according to a preliminary assessment.

The Embraer 190 plane made an emergency landing three kilometers from the city, Azerbaijan Airlines announced earlier.

The ministry initially said 25 people survived the crash, later revising that number to 29 as search and rescue operations continued at the crash site, reducing the reported death toll.

Azerbaijan’s Prosecutor General’s Office later reported that at least 32 people had survived, adding that the number was not final. The number of survivors could mean that more than 30 people could be dead.

The plane was originally supposed to fly from Azerbaijan’s capital Baku to the Russian city of Grozny in the North Caucasus. According to data from Azerbaijan Airlines, 37 passengers were citizens of Azerbaijan. There were also 16 citizens of Russia, six citizens of Kazakhstan and three citizens of Kyrgyzstan, it is stated.

Bird strike, GPS jamming

RIA Novosti quoted Russia’s civil aviation authority, Rosaviatsia, as saying that preliminary information indicated that the pilot decided to divert to Aktau after the bird struck the plane, leading to an “emergency situation on board.”

Mobile phone footage circulating online appeared to show the craft descending steeply before hitting the ground in a fireball. Other footage shows part of the fuselage torn from the wing and the rest of the plane lying upside down in the grass. The footage matched the colors of the plane and its registration number.

Some of the videos posted on social media show survivors pulling fellow passengers from the wreckage of the plane.

Flight tracking data from FlightRadar24.com showed the aircraft made what appeared to be a figure to the right as it approached Aktau Airport, its altitude moving up and down significantly during the final minutes of the flight before hitting the ground.

FlightRadar24 said in a separate online post that the plane faced “strong GPS jamming” that caused the “aircraft to send bad ADS-B data,” referring to the information that allows flight tracking websites to track the plane in flight.

In the past, Russia has been accused of jamming GPS transmissions in the wider region.

Embraer did not immediately respond to a request for comment early Wednesday morning. In a statement, Azerbaijan Airlines said it would keep the public informed and changed its social media signage to solid black.

Azerbaijan’s state news agency Azertac said an official delegation consisting of Azerbaijan’s emergency minister, deputy state prosecutor and vice president of Azerbaijan Airlines was sent to Aktau to conduct an “on-the-spot investigation.”

Azerbaijani President Ilham Aliyev, who traveled to St. Petersburg, returned to Azerbaijan after hearing news of the accident, the president’s press service said. Aliyev was scheduled to attend an informal meeting of leaders of the Commonwealth of Independent States, a bloc of former Soviet countries formed after the collapse of the Soviet Union.

In a statement on social networks, Aliyev expressed his condolences to the families of the victims. “With deep sadness, I express my condolences to the families of the victims and wish the injured a speedy recovery,” he wrote.

Russian President Vladimir Putin spoke on the phone with Aliyev and expressed his condolences, Kremlin spokesman Dmitry Peskov told reporters.

Both Kazakh and Azerbaijani authorities were investigating the accident. In a statement to The Associated Press, Embraer said the company “stands ready to assist all relevant authorities.”