FBI investigating hazmat incident at Dinkytown apartment building

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Update: According to the Minnesota Division of the FBI, testing "indicated the presumptive potential presence of ricin." 

The FBI is taking over the investigation into a report of a possible deadly poison in one of the apartments in The Marshall in Dinkytown, prompting the evacuation of hundreds of University of Minnesota students. 

Minneapolis Police Department spokesperson John Elder said the case has been transferred to the FBI as of Wednesday morning and police are now acting in a supporting role. 

The incident began around 4 p.m. Tuesday when police and fire officials learned a person who had been transported to the hospital reported a possible hazardous substance inside their apartment. Assistant Fire Chief Bryan Tyner said it was an "unconfirmed report of ricin." 

Crews responded to the apartment complex at 515 14th Avenue Southeast and evacuated the building. They located the substance inside the apartment and transported it to the Minnesota Health Laboratory for testing. 

Police said possible contamination is likely limited to the one apartment. 

Residents were allowed back into the building shortly after 9 p.m., but a police officer remained at the involved apartment overnight as a precaution.