The Cambridge man who was arraigned earlier in the week in connection with human remains found in a duffel bag and a recycling bin is now facing a murder rap.

Carlos Colina, 32, was arraigned on Monday on charges of assault and battery causing serious bodily injury and improper disposal of a body in connection with the gruesome incident. At that time, he faced no murder charge.

 Last weekend, police found a torso in a duffel bag outside the Biogen Global Command Center in Cambridge and severed limbs and a head in the apartment building where Colina lived. Authorities identified the victim as Jonathan Camilien, 26, of Somerville. Now, Middlesex District Attorney Marian Ryan says Colina will be arraigned on a murder charge next Tuesday.

Colina was held on $1 million cash bail at Monday’s arraignment.

The medical examiner has conducted an autopsy and toxicology results are still pending.