Cairo - Egyptian security officials say police have detained more than 60 supporters and members of the Muslim Brotherhood over the past 24 hours, including relatives of top leaders.
The crackdown on the group, from which ousted President Mohammed Morsi hails, started shortly after the 3 July coup. It intensified this month after a deadly security force raid that cleared out two of the group's sit-ins.
Officials, speaking anonymously in line with regulations, said on Wednesday that they arrested Saad el-Shater, the 23-year-old son of the Brotherhood's imprisoned deputy leader and financier Khairat el-Shater. The elder al-Shater is charged in relation to the killings of protesters outside the group's headquarters in June.
Also detained was the brother-in-law of fugitive Brotherhood figure Mohammed el-Beltagy on charges he incited violent protests.