New York (CNN) -- Two New York state men have been charged in a bizarre plan to develop a mobile X-ray system that would be used from afar to silently kill people that they deemed "undesirable," federal officials said.

Glendon Scott Crawford, 49, and Eric J. Feight, 54, were arrested Tuesday after an undercover operation by the Albany FBI Joint Terrorism Task Force. They were charged with conspiracy to provide material support for use of a weapon of mass destruction, according to the criminal complaint.

Crawford and Feight were developing a device "intended to be mobile ... designed to turn on remotely from some distance away" that would emit "some dangerous levels of X-ray radiation," according to John Duncan, executive assistant U.S. attorney for the Northern District of New York.

Individuals who might have been "subject to this X-ray radiation, would not immediately know that they had been harmed until some days later when they would either be injured, or it could result in their death," he said.

The suspects intended to use the device to harm and kill "enemies of Israel," a Department of Justice news release said.

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