He said: "Extensive searches are currently taking place on the scene."
Romania police spokesman Ciprian Aldea said there were parts of the helicopter and human remains around the crash area.
He said: "It is a very difficult area, very rocky.
"You can't reach the area without the appropriate search equipment."
The cause of the disaster is unconfirmed, but onlookers reported seeing smoke and flames coming from the helicopter.
There have been several other accidents involving CH-53 helicopters in Israel, including a crash in 1997 on the border between Israel and Lebanon, in which 73 people died.
