YUMA, Ariz. » Twin 18-month-old boys were pronounced dead at a hospital after being pulled from an Arizona canal, police said Saturday.

Police officers and the fire department were called to a neighborhood on Yuma’s east side at 9:45 a.m. Friday to help find two people who fell in a canal, police spokesman officer Joe Franklin said. After a search that lasted more than an hour, the brothers were pulled from the water.

They were flown by a U.S. Marine Corps helicopter to a Yuma hospital, where they were pronounced dead, Franklin said.

Detectives investigating the case believe the boys ended up in the canal by accident and don’t suspect foul play, Franklin said. The area along the canal is used by families for walks and by joggers and a family member was nearby when the boys ended up in the water.

Franklin would not provide details of the events that led up to the toddlers ending up in the canal.

Yuma Fire Department spokesman Mike Erfert said their crews were called out on a possible drowning. Helicopters from the U.S. Border Patrol and the Marine Corps also flew over the canal searching for the boys.

The Border Patrol helicopter crew spotted the brothers in the water, Erfert said, and they were pulled out at about 11:20 a.m. Paramedics began immediate life-saving efforts and the boys were quickly loaded onto the Marine Corps helicopter for the trip to the hospital.