Christopher Meli, 20, was found dead near houses at Glasvey Close. Detectives said he had suffered a sustained and vicious assault.
The youths were detained on Tuesday evening.
On Tuesday, three teenagers, two aged 18 and a 16-year-old youth, appeared in court charged with Mr Meli's murder.
Two teenagers aged 18 and 17, who were arrested by detectives on Sunday, have been released on bail pending further inquiries.

Three prisoners have been recaptured while 57 others managed to escape and remain at large.
Authorities have warned that the escaped inmates, some of them still awaiting trial, pose a serious threat to the safety of the area.
The prison in Lae, Papua New Guinea's second largest city, has seen repeated similar escapes over the past years.
"The majority of those who escaped were arrested for serious crimes and were in custody awaiting trial," police Chief SuperÂ­inÂ­tendent Anthony Wagambie was quoted in several local media.
"A good number were arrested by police last year for mainly armed robberies, car thefts, break and enter and stealing. Among them are convicted prisoners."
He warned the escapees that they would be caught and encouraged them to surrender themselves to community leaders, church elders or family members to then be taken back to prison.
Prisons in Papua New Guinea often suffer from overcrowding, poor conditions and long waiting periods for prisoners awaiting trial.
In 2016, at least 11 prisoners were shot dead and more than 70 escaped when they stormed the main gate, overpowering the guards.
The previous year, some 50 prisoners managed to escaped in a similar way.

Saints' 3-0 reverse at Everton on Monday completed a difficult Christmas period for Claude Puel's side.
But Stephens, who made his Premier League debut at Goodison Park, believes a change of form is on the cards.
"We just need that little bit of extra luck, or extra quality to go 1-0 up," he told BBC Radio Solent. "These things happen and we'll bounce back."
Stephens, 22, found himself introduced in the sixth minute at Everton, when injury forced Cedric Soares off.
"I enjoyed playing the game," he said. "But at the end of the day, I want to win and being on the end of a 3-0 defeat isn't good.
"We'll pick ourselves up and work hard and I'm sure it will turn round. I don't think there's too much wrong, it's not a disaster and it's not time to panic."
Five more teenagers - two males and three females - have been arrested over the murder of a man in west Belfast's Twinbrook estate at the weekend.
[NEXT_CONCEPT]
Prison guards have shot dead 17 inmates after a mass breakout at Buimo prison in Papua New Guinea.
[NEXT_CONCEPT]
Southampton defender Jack Stephens has insisted it is "not the time to panic" despite their third defeat in six days.