A military plane crashed during training on Tuesday, killing its two pilots on board, Turkey’s defense ministry announced.

The SF-260D training plane crashed into an agricultural field in central Turkey, after taking off from a Air Force base near the city of Kayseri.

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The defense ministry said the cause of the crash remains unknown. The state-run Anadolu Agency reported that authorities have initiated an investigation.

Television footage captured black smoke rising from the wreckage of the plane among the crops in the field.