Police: 'New breed' of terrorists in Northern Ireland

Police in Northern Ireland arrested two teenagers Saturday in connection with the fatal shooting of a young journalist during rioting in the city of Londonderry and warned of a "new breed" of terrorists threatening the peace.

The men, aged 18 and 19, were detained under anti-terrorism legislation and taken to Belfast for questioning, the Police Service of Northern Ireland said. The men have not been identified or charged.

Authorities believe one man pulled the trigger during the chaotic rioting that began Thursday night but had organizational support.

Lyra McKee, 29, a rising star of investigative journalism, was shot and killed, police say probably by a stray bullet aimed at police, during the rioting. Police said the New IRA dissident group was most likely responsible and called it a "terrorist act."

The use of a firearm apparently aimed at police marks a dangerous escalation in sporadic violence that continues to plague Northern Ireland 21 years after the Good Friday peace ...