Masked men fired shots at the event on August 20.
A man arrested yesterday in connection with the firing of shots at a republican commemoration in Derry last week has been released.
The shots were fired by masked men during a commemoration event to mark the 40th anniversary of the Derry hunger striker Mickey Devine on August 20.
A police spokesperson said detectives investigating the shooting incident in the Fern Park area of Galliagh carried out a planned search of a house in the city on Saturday.
A number of items were seized and the 30-year-old man was arrested.
A police spokesperson yesterday said the man had been released following questioning.
"The incident remains under investigation," the spokesperson added.
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