Two adults and three children were injured this afternoon in a Capitol Hill park when a large tree branch fell without warning, authorities said.

D.C. Fire/EMS spokesman Pete Piringer said that around 1:45 p.m., children enrolled in the People’s Church Children’s Vacation Bible Camp were playing and having a picnic in Garfield Park when a “tree-sized” branch of a large oak tree fell on the group.

Two adults suffered potentially life-threatening injuries and were taken from the park, in the 600 block of Third St SE, to the hospital, Piringer said. Three children were also taken to the hospital with serious, but non-life threatening injuries.

Piringer said the ages of children in the camp ranged from “young to teenagers.”

City arborists are on the scene to assess the health of the tree, officials said.