NEW : There are gangs of youths on the streets , authorities said , but there have been no arrests or injuries . Two bombs thrown at police after midnight in connection with soldiers ' killings . Police arrested over slayings of two soldiers in Northern Ireland last week . Three soldiers also being held in Monday 's custody of an officer . Irish republican groups have reportedly claimed responsibility for the killings .
NEW : Two bombs thrown at police after midnight in connection with soldiers ' killings . Police arrested over slayings of two soldiers in Northern Ireland last week . Three soldiers also being held in Monday 's custody of an officer . Irish republican groups have reportedly claimed responsibility for the killings .