Two-year-old snatched after double murder

US police are searching for an armed man and have issued an alert for a two-year-old boy after two people were found dead in an apparent double murder in Rhode Island.

Toddler Isaiah Perez was discovered missing from a Johnston home at about 4:30 am.

Police say the Amber Alert is part of a double-homicide investigation but gave no details.

Authorities are searching for 22-year-old Malcolm Crowell, who they say snatched Isaiah from the home.

Police say he should be considered armed and dangerous.

Isaih lived with the two people who were found dead, WPRI-TV reported. Police say Crowell had a link to the boy.

Johnston is a town of about 30,000 people less than 10 miles from Providence.