A Texas sheriff says someone threatened to bomb a county courthouse near Fort Hood unless officials met the demands of the Army psychiatrist charged in the 2009 shooting rampage on the Army post.
Major Nidal Hasan is jailed in Bell County because Fort Hood doesn't have holding facilities.
Sheriff Eddy Lange says Hasan hasn't made any demands.
The jail was put on lockdown after Wednesday's threat.
Lange says law officers evacuated the historic courthouse and Bell County Justice Center, but found nothing after searching with bomb-sniffing dogs.
City of Belton spokesman Paul Romer says employees were allowed back inside a few hours later.He says the time the caller said the bomb would explode had long expired.
Hasan's trial starts in July at Fort Hood.He faces execution if convicted.
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