Two children were killed when a tree limb fell on their tent at Yosemite national park in California, the US national park service says.
The limb fell from an oak tree at Upper Pines campground in the Yosemite Valley at approximately 5am on Friday. Park rangers responded but found both children dead.
The names and ages of the children were not released, and the incident is being investigated, the park service said in a statement.
“Our thoughts are with the families as they grieve this tragedy,” said park superintendent Don Neubacher.
The Upper Pines campground is a popular area of the park about 200 miles due east of San Francisco.
• This article was amended on 20 August 2015. An earlier version said that Upper Pines campground is 200 miles due west, rather than east, of San Francisco.
