The helicopter that crashed into New York City’s Hudson River on Thursday, April 10, killing all six people on board—including three children—was not equipped with flight recorders, according to the National Transportation Safety Board (NTSB). In a statement released Saturday, the NTSB said no video or data recorders had been recovered from the Bell 206 helicopter, and none of the onboard equipment captured information that could aid in the investigation. NYPD divers are continuing their search for key components such as the main rotor, gearbox, tail rotor, and tail boom.

Among the victims were a senior Siemens AG executive, his wife, and their three children. Investigators noted the helicopter had undergone a major inspection on March 1 and had completed seven tour flights before the incident. All passengers and the pilot were recovered from the submerged aircraft. Four victims were pronounced dead at the crash site, while the other two died at local hospitals.

Parts of the wreckage—such as the cockpit, cabin, stabilizer finlets, vertical fin, and a portion of the tail boom—have been sent to NTSB labs in Washington for examination. The investigation also includes a review of two similar helicopters and discussions with New York Helicopter Charter, the operator of the ill-fated flight. Officials are assessing the company’s operational procedures, safety systems, and the pilot’s background.

According to NYPD Commissioner Jessica Tisch, the helicopter departed a downtown Manhattan helipad at around 3 p.m. ET, heading north along the Hudson River. After reaching the George Washington Bridge, it turned south and then crashed near Lower Manhattan, close to Jersey City, at approximately 3:15 p.m., landing upside down in the river.

Disclaimer: This image is taken from Reuters.