A federal official says a former Russian military tank commander awaiting sentencing on terror-related charges is on a hunger strike.

Deputy U.S. Marshal Brian Stalnaker says Irek Hamdullin is calling it a hunger strike, but has been "sneaking" a few bites of food. He says Hamidullin has raised some medical complaints, which have been addressed, but hasn't made any other concrete demands.

A federal jury convicted Hamidullin in August of planning and leading a Taliban attack on U.S. forces in Afghanistan. Hamidullin was found guilty on 15 counts, including providing material support to terrorism. Sentencing is set for Dec. 3.

Hamidullin sat through a hearing earlier this month with his head resting on a table. One of his attorneys told the judge that Hamidullin, who is Muslim, had been fasting.