DOVER, Minn. – A Chatfield tree-cutter was critically injured when a tree came down on him outside Dover. The injuries were life-threatening, a deputy said. The man, whose name was not released immediately, was taken 23 miles to a Rochester hospital. His age was reported to be 60. The accident was shortly before 9 p.m. near the Ready-Mix plant in the 200 block of Seventh Street Northwest. No one witnessed what jappened. The man was found face-down in a ditch by a person who was aware he was cutting trees and went to check after his chainsaw went silent.