Hazmat at federal mail facility in Md.

Update, 5 p.m.:

The FBI is investigating the suspicious letters discovered at the mail facility in Capitol Heights Thursday afternoon, but officials say they pose no immediate danger to public safety.

What exactly was contained in the letters remains unclear. Mark Brady, a Prince George's County Fire/EMS department spokesman, said local hazmat teams cleared the scene at about 3:45 p.m.., but he referred specific questions on the items to federal authorities.

Lindsay Godwin, a FBI spokeswoman, said her agency was investigating the case, but not as one in which terrorism or threats were involved. She declined to say exactly what the letters contained that sparked the investigation.

"We are responding to letters that do not pose a threat to terrorism and do not contain a threat," she said.

Original Post:
The Prince George's County Fire/EMS Department's hazardous materials team has been called to a federal mail facility in Capitol Heights to help investigators probe a suspicious package, said Mark Brady, a fire department spokesman.

Brady said the hazmat team has been at the facility at 9140 E. Hampton Dr. in the Capitol Heights area since about 11 a.m. He said it is "not an unusual occurrence" for them to be called to the facility to help inspect packages that look suspicious.

"We go there on a regular basis to help them identify suspicious packages," Brady said.

Brady said he had no details on what the suspicious package looked like or if there was more than one. More details will be provided as they become available.