The mystery surrounding the collapse of turkey oak trees in a Guernsey park may have been solved.
Signs of fungal decay were found in the trees
The two trees in Saumarez Park fell down in July, one while a nearby playground was in use, narrowly missing children and parents.
Decay in the trees was later found by Tree Officer Andy McCutcheon.
He believes they were damaged 30 to 40 years ago, possibly when the playground was built. The play area has been closed since the trees fell.
Mr McCutcheon said: "We certainly know that it was decay that caused the problem.
"Looking at the rings of the trees, it appears that something happened to them between 30 and 40 years ago.
"Most likely was that it was the children's playground being built. It was made about 1971, I believe.
"The result of that development was that it could have caused a lot of damage in the roots of nearby trees."
Repairs to the popular play area are to begin this month. People are being urged to keep out of the park until the repairs are completed.