The 56-year-old man was set to appear in court Monday to be charged with attempted murder, said Western Australia state police spokesman Roy Hamilton. Authorities have not released the name of the suspect, who faces a maximum sentence of life in prison if convicted.
Hamilton said the 25-year-old victim was in satisfactory condition with gunshot wounds to his buttocks and stomach in a hospital in the city of Fremantle , just south of the state capital, Perth.
The victim had been entertaining friends on Saturday afternoon at his home near Perth when the neighbor approached wielding a board, Hamilton said.
"An argument ensued about the man's loud music, with the man threatening the residents with a length of timber, before he left the premises and returned with a rifle," Hamilton said.
The older man fired three shots at the house and two shots at the victim, Hamilton said. He was quickly arrested.
Hamilton said he did not know what kind of music or rifle was involved.
The choice of the city of Helsinki is not incidental as the capital of Finland had hosted US-Soviet negotiations on the limitation of nuclear stockpiles in 1969