Police at Strand Road in Derry are trying to get in touch with a man who tried to intervene in a domestic dispute and ended up being assaulted.
Detective Constable Scott, the investigating officer, explained that at about 7.30pm last night a man and a woman became involved in a dispute at Sackville Street.
When a passerby intervened, he was assaulted by the man.
Police arrived a short time later and arrested the man.
The passerby, however, left the scene and police would like to speak to him.
He can get in touch with police on the 101-non emergency number.
