Authorities are investigating the death of a one-month-old boy in Southeast Washington last week as a homicide after an autopsy found the infant had blunt force impact injuries, D.C. police said Sunday.

Police said officers found the boy, Raj’saun Tyrik Brown, at 9:40 a.m. Oct. 29, after responding to a call for an unconscious baby at an address in the 1700 block of Trenton Place SE. He was taken to an area hospital where he succumbed to his injuries. Authorities did not disclose if the address was the child’s home or if anyone was with him at the time, said Officer Paul Metcalf, a police spokesman.

As of Sunday, police had not made any arrests in connection with the boy’s death, Metcalf said.

The Metropolitan Police Department is offering a reward of up to $25,000 to anyone who provides information which leads to the arrest and conviction of the person or persons wanted for any homicide committed in D.C.

Anyone with information about this case contact the department at 202- 727-9099. Authorities said tipsters may send anonymous information to the department’s TEXT TIP LINE by text messaging 50411.