( CNN ) -- Iranian authorities have buried the body of a political prisoner , who was executed last week , without the presence of his family or friends , his son told CNN . Ali Saremi 's body was buried over the weekend at the Amir-Abad village in Boroujerd , nearly 400 kilometers southwest of Tehran . `` The authorities never informed my family about my father 's execution and now the government has barred us from holding any kind of funeral service , '' his son , Akbar Saremi , said . Ali Saremi was hanged for `` fighting against the sacred Islamic Republic of Iran system and launching antagonist propagations , '' Iranian state-run media reported at the time of his execution Tuesday . Iranian authorities allege that Saremi was a member of the People 's Mujahedeen of Iran , also known as the Mojahedin-e Khalq Organization , which has opposed the Iranian government for decades . Tehran considers the group to be a terrorist outfit , as does the United States . The European Union does not . Members of the Friends of a Free Iran group condemned Saremi 's execution Tuesday , calling it `` another crime for which the mullahs will be held to account when freedom is finally restored to that beleaguered nation . '' The group also demanded that Iranian leaders `` be tried in the International Court of Justice for crimes against humanity . '' Ali Saremi had been arrested five times since 1982 . His latest arrest came in 2007 after visiting his son at Camp Ashraf , a refugee community in Iraq that is home to an estimated 3,500 exiled members of the Mujahedeen , Akbar Salemi told CNN . Saremi was arrested for his alleged presence at anti-revolutionary gatherings organized by the People 's Mujahedeen and for sending information for the group , according to Iranian state media reports . Akbar Salemi denied those allegations , saying his father 's `` only interest in Mojahedin-e Khalgh ( MEK ) and Camp Ashraf was to visit me , and that 's the last time I saw my father . '' `` This is a very difficult time for my family , '' Akbar Saremi said , adding that other family members are being targeted now . `` My cousin is still being detained after he displayed a picture of my father on the door of the family home as a sign of mourning , '' Saremi said . Other family members were detained last week as they gathered outside the prison where Ali Saremi was hanged . They have since been released .
Ali Saremi was executed without the presence of his family , his son Mr . Saremi , for ` ` ' antagonist propagations '' against the government . His family says other family members are being arrested now .