Two juveniles are due before Coleraine Magistrates' Court in Co Derry this morning to answer charges in connection with the murder of Michael McIlveen.
One of the youths is aged 15 and will face a murder charge. The other is 16 and is expected to face a charge of affray. Neither can be named for legal reasons.
This will bring to seven the total now charged in the case, all of them teenagers. Five were charged with murder last week and are on remand to reappear in court early next month.
The police investigation continued at the weekend with an operation at the car park were the Catholic teenager was beaten in Ballymena, Co Antrim.
In particular they want to talk to more than 20 people they believe were in the vicinity of the car park at the cinema where they said an "altercation" took place involving Michael McIlveen and a loyalist gang.
They are also continuing to examine video evidence from CCTV cameras in the area and have stepped up foot patrols to prevent rising sectarian tensions spilling over into further violence.
The DUP-controlled council has opened a book of condolence, while James Currie, an Ulster Unionist councillor, has appealed to young Protestants not to allow themselves get caught up in loyalist gangs.
It is understood the body of the murdered teenager has still to be released for burial, and the funeral is not now expected until midweek.
Assembly members are to observe a minute's silence when they gather in Stormont this morning.