The defendants were accused of possessing explosive materials with the intention of terrorizing the city of Sohar, Gulf News reported.
Khalid bin Hamoud al-Badi, Khaled bin Hamad al-Badi, Khalid bin Saeed bin Humaid al-Badi, Khalid bin Abdullah al-Badi, Amer bin Khamis al-Muqbali, Abdul Aziz al-Shamsi and Abdul Aziz al-Muqbali were sentenced to 2 1/2 years imprisonment Tuesday for terrorist activities.
Khalid bin Abdullah al-Badi and Abdul Aziz al-Muqbali were given 30 months for aiding the main conspirators, and Khalfan al-Muqbali, Ali Bin Rashid al-Muqbali, Thahi al-Omrani, Yusuf al-Badi and Saud al-Roshdi got three months.
Meanwhile, eight detainees from Salalah were freed Tuesday but will have to appear in court.
Abdul Hakim, the son of one of the men, said they were in good health after four months in jail.
A protest against the Sohar sentences has been called for after prayers on Friday.