Egypt's High State Security prosecution referred on Wednesday 304 people to military prosecution for membership in the Islamist militant group Hasm, which has claimed responsibility for a number of deadly attacks on security forces and assassinations of public figures over the past six months.

According to a statement by the High State Security prosecution, 144 people have been arrested and are currently detained pending investigations, including leading Muslim Brotherhood member Mohamed Ali Beshr.

The prosecution said the case is “one of the largest” to be referred recently  to military prosecution.

The prosecution added that the defendants are responsible for a number of attacks against security forces and public figures, including the attempt to assassinate former Grand Mufti Ali Gomaa and the assassination of high ranking army officer Adel Ragaei.

The prosecution also said that Hasm, along with militant group Lewaa Al-Thawra, was formed by leading figures in the banned Muslim Brotherhood in an “attempt to revive its militant wing.”

The prosecution also said that the security forces raided 41 militant hideouts.