WASHINGTON (WUSA9 ) -- The FBI is investigating another white powder call at Georgetown University, according to a DC Fire/EMS spokesperson.* Law enforcement has secured the area in the 3700 block of O St. NW (Graduate School of Arts and Sciences) Tuesday morning.
Tuesday morning, Georgetown University alerted DC Fire & EMS of possible ricin in one of the residence halls on campus, according to a police spokesperson.
Initial field tests for biological agents in the area were negative and DC Fire EMS advised there was no immediate risk to the area, says the spokesperson.
Police say students were told they could remain in all campus buildings.
Law enforcement authorities have recovered a substance from reported location, according to police, and will be conducting further testing of that material.