Egypt announced Tuesday the arrest of 54 members of the banned Muslim Brotherhood group.
The Interior Ministry charged that the suspects were plotting to foment chaos on the anniversary of the 2011 uprising.
"Information has become available ... that escaped leaders of the (Muslim Brotherhood) were implementing a plot to create a state of chaos in the country during the months of January and February, to coincide with the anniversary of the 25 January revolution," it said in a statement.
It identified the Brotherhood figure behind the planned attacks as Yasser al-Omda and said he had set up an organization called Allahuma Thawra.
Members of the group were planning to "cut roads, disrupt traffic, and try to spread chaos and terrify citizens", it added.
The statement did not identify any of those arrested, but said legal measures were being taken against them in coordination with the state security prosecutor.
The individuals were arrested over the past weeks in different locations. It released images of old desktop computer towers and crude weapons like steel caltrops and spiked metal balls, which belonged to the group.
