(In final paragraph, Public Prosecution Service of Canada corrects length of Ashton Larmond's parole ineligibility to half the time sentenced from 10 years.)
OTTAWA (Reuters) - A Canadian court on Friday sentenced twin brothers to a combined 24 years in prison after they plead guilty to terror-related offences, including trying to leave the country to join a radical Islamic group.
Ashton Larmond, 25, was sentenced by an Ontario Superior Court to 17 years in prison minus time already served for giving instructions to carry out an activity for an extremist group, public prosecutors said.
His brother, Carlos, was given seven years minus time served for attempting to leave Canada to participate in a militant group.
Carlos was arrested at the Montreal airport in January 2015 as he was trying to leave Canada. His brother and a third man, Suliman Mohamed, 23, were arrested shortly later.
The prosecutor in the case said Ashton directed plans to join Islamic State in Syria or kill people in Canada, and described him as more of an organizer than his brother, the Canadian Broadcast Corporation reported.
Mohamed was also sentenced on Friday to seven years minus time served for conspiring to participate in the activities of a militant group.
So-called "extremist travelers" are a growing concern for Canada, which suffered two deadly attacks by homegrown radicals in 2014.
A report issued on Thursday showed the number of people who have traveled overseas from Canada and are suspected of involvement in radical activities has grown.
Earlier this month, an Islamic State supporter who was in the final stages of preparing an attack on a Canadian city with a homemade bomb was killed during a police raid at his home in Ontario.
Both brothers, as well as Mohamed, will be ineligible for parole until they have served half of their sentences.
Reporting by Leah Schnurr; Editing by Dan Grebler