Police investigating the fatal stabbing of 33-year-old Robert McCartney near a pub in Belfast on Sunday night are now questioning three men about the incident.
Earlier police released without charge one of two men detained yesterday. There were two further arrests this evening.
PSNI members were attacked by youths in the Markets area of the city again this afternoon when they surrounded a house.
Three officers received minor injuries, according to the PSNI.
Earlier, a white car was removed for forensic examination and the area around the pub where it is believed a fight took place before the stabbing, was sealed off for forensic examination.
Police also searched the roof of the adjacent St George's Market.
A second man injured in the same incident was taken to hospital with a stab wound which was not thought to be life-threatening.
Mr McCartney was from Mountpottinger Road in the nationalist Short Strand area of east Belfast. Police have again appealed for anyone who was in the vicinity of Magennis's Bar around 10.30pm on Sunday evening to contact them.
Police come under attack
Last night, police were attacked by youths throwing stones and missiles as they first conducted searches in the Markets area.
SDLP Deputy Leader Alasdair McDonnell said he had been told by local people that prominent Provisional IRA members were involved in the incident at the pub linked to the death of Mr McCartney.
Sinn Féin Assembly member and former Belfast Lord Mayor Alex Maskey would not condemn the rioting, which he said had involved young children.
Mr Maskey said he had been present in the Markets most of yesterday afternoon in an attempt to defuse the situation. He claimed police had acted in a heavy-handed manner and that the PSNI raids were like those of the RUC several years ago.
