A team of law enforcement officers has entered the home of a man accused of sending letters with poisonous ricin to the president and others.
At least a dozen armed officers wearing gas masks and hazardous-material suits went into the home in Corinth, east of Memphis, Tennessee.
There was no immediate word on what they found inside.
Police had blocked off the home with crime-scene tape since Paul Kevin Curtis' arrest on Wednesday. No neighbours have been evacuated.
Curtis, 45, appeared briefly in court on Thursday and his attorney said he was innocent.
His brother says the family hopes federal officials will make sure he gets treatment for his mental illness while he is in custody.