The crackdown on the group, from which ousted President Mohammed Morsi hails, started shortly after the July 3 coup.
It intensified this month after security forces cleared out two of the group's sit-ins, killing hundreds and sparking unrest that killed more than 1,000 people in a few days. The Interior Ministry says more than 100 policemen and soldiers have also been killed since mid-August.
The local media, in close step with the new leadership after Morsi, repeatedly describe the actions of the Brotherhood and its supporters as acts of terrorism. Many have been charged with inciting violence. Security forces have arrested much the Brotherhood's senior and midlevel leadership, while others remain in hiding.
In an interview late yesterday with the Arabic satellite channel MBC Misr, interim Prime Minister Hazem el-Beblawi said dissolving the group is not a solution and warned against taking dramatic decisions during turbulent times. He suggested it is better that the government monitor political parties rather than force any to operate secretly, as the group had done for decades.
More From This Section
But in a widening campaign, police have started going after members' relatives, including the son of Khairat el-Shater, a Brotherhood deputy and financier charged in relation to the killings of protesters outside the group's headquarters in June. A US citizen, the son of a fugitive Brotherhood figure, was also detained this week.
The brother-in-law of fugitive Brotherhood figurehead Mohammed el-Beltagy also was arrested in the latest sweep on charges he incited violent protests aimed at toppling the military-backed government that took over after Morsi.
Police officials said Saeed Zaki Eissa and two others known to be affiliated with the Brotherhood were detained in Egypt's second largest city of Alexandria after prosecutors ordered their arrest.