A 21-year-old man accused of killing an elderly couple in Blackpool at the weekend has been charged with another murder.
Jemmimah Cargill, who was 75 and another pensioner in the resort, died in a flat fire on Caunce Street in Blackpool last month.
Stephen Akinmurele is already accused of murdering Eric Boardman, 77, and his wife Joan, 74, also in Blackpool.
The bodies of the couple, married for 27 years, were discovered by one of their daughters.
The cause of their deaths has not been determined.
Detectives are also concerned about a man who was staying in the resort and has gone missing.