A suspect has been arrested after a duffel bag containing human remains was found near a police station in Massachusetts - as more remains have been discovered inside an apartment building. The person, who will not be identified until their arraignment on Monday, was taken into custody after the bag was found on Loughery Way in Cambridge on Saturday morning, according to authorities. They have not been charged with homicide. Instead, they are 'under arrest for accessory after the crime of assault and battery causing serious bodily injury and improper disposal of human remains'. It comes as additional human remains have been found in the common area of an apartment complex on 6th Street, across the road from where the bag was discovered on the pedestrian-only walkway. Scroll down for video . Scene: A suspect has been arrested after a duffel bag containing human remains was found on Loughery Way in Cambridge, Massachusetts, just a block away from a police station. Above, police at the scene . Evidence: More than a dozen investigators were pictured examining the area where the bag was discovered on Saturday morning. Some officials were seen removing boxes and bags of evidence from the area (above) Speaking at an evening press conference, Middlesex District Attorney Marian Ryan said all of the remains are believed to belong to one person, who has also not been identified by officials. The victim's death is being treated as a homicide, she added, according to CBS. The duffel bag containing human remains was spotted outside a building used by biotechnology company Biogen Inc, one block away from the police station, on Saturday morning, police said. It was described as a large item, similar to a hockey bag, by witnesses. The building was quickly cordoned off, and more than a dozen investigators were seen examining the site throughout the day. Some officials were pictured removing boxes and bags of evidence from the area. A spokesman for Biogen referred all inquiries to police. The surrounding neighborhood includes Kendall Square near the Massachusetts Institute of Technology and Harvard Square. Second discovery: It comes as more human remains have been found in the common area of an apartment complex (pictured) on 6th Street, across the road from where the bag was discovered just hours earlier . Officials and press at the site: Speaking at an evening press conference, Middlesex District Attorney Marian Ryan said all of the remains are believed to belong to one person, who has also not been identified . After video surveillance led police to the apartment complex where more remains were found, Cambridge Police Commissioner Robert Haas reassured the building's residents of their welfare. 'We want to reassure the individuals living in the apartment that they are safe,' he said during the press conference, adding: 'We don't think there's a threat to the community at this point in time.' Residents who left the building were allowed to re-enter only after showing proof they lived there. Officers, who were expected to remain there all evening, then escorted them to their apartments. The suspect will be arraigned on Monday at Cambridge District Court. An investigation is ongoing. Cordoned off: The duffel bag containing human remains was seen outside a building used by biotechnology company Biogen Inc, one block away from the police station, on Saturday morning, officials said .
Bag was discovered near Cambridge police station on Saturday morning .
More human remains later found in a common area of apartment building .
A suspect has been arrested and charged with 'accessory', not homicide .
They will not be identified until the arraignment on Monday, officials said .
Cambridge Police are treating grisly situation as homicide investigation .