LOWELL, Mass. (AP) -- A Groton man is facing charges after allegedly threatening a Lowell police officer with a syringe full of blood he said was infected with the AIDS virus.

Gregory Tammaro is scheduled to be arraigned Wednesday on charges including assault with intent to murder.

Police responded to a city building at about 5 p.m. Tuesday to reports of a man using intravenous drugs in a bathroom.

Police tell The Sun of Lowell that the man pulled the blood-filled needle out of his arm, said he had AIDS, and charged at an officer. Police used pepper spray to subdue the suspect.

The officer was not hurt.

The 24-year-old Tammaro was taken to a hospital and held overnight. It was not clear if he has a lawyer.