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Two more people have been released on police bail over the murder of a father-of-two from Strood.
A 34-year-old man, from Brighton, was arrested at Gatwick airport on Sunday on suspicion of conspiracy to murder Xhem Krasniqi.
And a Hove woman, 32, was held on suspicion of assisting an offender on Tuesday.
Sussex Police said the pair have both been released on police bail until Monday, July 22 pending further inquiries.
It comes after three other men were arrested at the weekend in connection with the killing.
Detectives questioned a 26-year-old and a 30-year-old from the Hove area.
Another man, also 30, from the Scaynes Hill area of East Sussex has also been arrested. All three were arrested on suspicion of assisting an offender and possession of Class A drugs with intent to supply.
They have now all been released on bail until July 18.
Scaffolder Mr Krasniqi, 31, died of a single gunshot in a Hove street after an alleged dispute between warring families.
The Albanian national was in Brighton with his wife and their four-year-old daughter and son of seven before trouble broke out at about 11.30pm.
Two men with Mr Krasniqi were uninjured and police are treating their shootings as attempted murder.
Police believe a dispute between two warring families could have led to the murder of Mr Krasniqi and are continuing to hunt his killer.
Officers are still seeking 30-year-old Edmund Nela and have warned members of the public not to approach them. He has not been seen since Mr Krasniqi died.
Mr Krasniqi's family earlier paid tribute to a "devoted family man".
They said: "Xhem was a loving and devoted family man living a normal life in Kent.
"He worked very hard as a scaffolder and was a good provider for his wife and children.
"He loved his family and friends very much and was the type of man who would do anything for anyone.
"He was a father of a four-year-old girl and a seven-year-old boy who miss their Daddy very much."