LYNNWOOD, Wash. (AP) – The Snohomish County Medical Examiner has released the names of two children killed in a townhouse fire in Lynnwood Sunday, finding their deaths were accidental and due to smoke inhalation.

The Seattle Times reports the victims were identified as 15-year-old Victoria Jimenez Lopez of Shoreline and her 7-year-old brother Mardoqueo Jimenez Lopez. The siblings were visiting a relative when the fire broke out.

The children died in a fire at a two-story townhouse located at the Lynnwood Townhouse Apartments Sunday afternoon. Dozens of firefighters responded to the blaze after reports there were people trapped inside.

Three other people who had been inside managed to escape, including two adults and an 11-year-old boy who was treated for smoke inhalation.

The cause of the fire remains under investigation.

Information from: The Seattle Times, http://www.seattletimes.com