Update at 7:15 p.m.: The Middlesex County district attorney's office has released the names of the victims. They are: Scott Jones, 43; Mei Kum Jones, 43; and the married couple's infant twin sons, Colt and Cameron Jones.

Police outside the Newland Road home where four bodies were found. (Jack Lepiarz/WBUR)

Colt and Cameron would have turned 1 year old on Nov. 26, the DA's office said.

The cause and manner of death are pending an autopsy.

Authorities reiterated that they are not looking for any additional suspects and there is no threat to the public.

Earlier post:

ARLINGTON, Mass. — Law enforcement officials say four people, including two infants, were found dead inside an Arlington home on Monday.

Arlington Police Chief Frederick Ryan said the bodies of two adults and two infants were found midday by an officer who'd been asked to do a well-being check.

At a press briefing late Monday afternoon, near the home at 45 Newland Rd., Middlesex District Attorney Marian Ryan said further details about the victims and the manner of their deaths were being held, pending next-of-kin notification.

Frederick Ryan added that there is no risk to public safety.

"It's obviously a very troubling, very tragic situation," Marian Ryan said.