The Israeli military says a combat helicopter has crashed in a training accident, killing one pilot and critically injuring another, reported The Associated Press.

The military identified the pilot killed as Maj. David Zohar, a 43-year-old reserve pilot. A second officer was evacuated to a hospital after the craft crashed at Ramon air force base.

Israeli media said the Apache helicopter suffered a technical malfunction late Monday and crashed near the base’s landing pad.

The military said early Tuesday that an investigation has been launched. Pending its result, the air force command has ordered that all Israeli combat helicopters be grounded.