Suspect packets at US state offices
Two packages have exploded in two government buildings in the state capital of Maryland, US officials said.
Maryland state police said there were no serious injuries.
The explosions occurred on Thursday afternoon US time at the Jeffrey Building on Francis Street in central Annapolis and another at the Maryland Department of Transportation building in Hanover.
A Maryland police spokesman later said the packages produced smoke and odours when they were opened at two separate state buildings.
State officials initially said the packages exploded, but later reports suggested there may have been no blasts.
Spokesman Greg Shipley says mailrooms at state offices across Maryland are being quarantined until it is determined if any other packages have been sent.
A Homeland Security Department official said the department is aware of the incidents and is monitoring them. Maryland authorities and the FBI are responding.