Iran ? Iranian authorities said Monday that they were holding the bodies of five slain anti-government protesters, including the nephew of the opposition leader, in what appeared to be an attempt to prevent activists from using their funerals as a platform for more demonstrations.

Pro-reform Web sites and activists said the government also detained at least eight prominent opposition figures — including a former foreign minister — in an intensified crackdown that could fuel more violence of the kind that engulfed the center of Tehran on Sunday. The activity pushed the bitterly opposed camps beyond any immediate prospect of reconciliation or compromise.

Hardliners, including clerical groups and the elite Revolutionary Guard, issued statements urging the country’s judiciary to take action against the opposition for violating Islamic principles and insulting the head of Iran’s religious leadership, Supreme Leader Ayatollah Ali Khamenei.