Three additional members of the Muslim Brotherhood were arrested in Egypt on Sunday, bringing the total number of party members taken into custody during the past week to fifteen.
The three members were apprehended by Egyptian security forces in the Cairo suburb of Giza in the early hours of the morning, according to the AP. Twelve other members were arrested on Friday, the group reported.
Egyptian Interior Ministry spokesmen, however, said that four men had been arrested on Saturday.
For some, including Muslim Brotherhood deputy leader Mohamed Habib, the arrests were a sign that Egyptian authorities are opposed to political reform.
"The government and the regime want to send a message to us ... that there is nothing new and that all the promises it made for political reform must be forgotten," Habib said, according to Reuters.
The Muslim Brotherhood, a banned but tolerated opposition party, won widespread support to the surprise of many in recent Egyptian elections.
Nearly one fifth of the seats in Egypt's parliament were taken by the party, representing the strongest showing of the group in any Egyptian election.
Hundreds of other Muslim Brotherhood activists were arrested while elections were underway.