CAIRO: Four suspected Egyptian Islamists were killed south of Cairo early Friday while preparing explosives on a farm owned by a senior member of the banned Muslim Brotherhood, police said.
It was not immediately clear whether the Brotherhood leader who owned the chicken farm, Ahmed Arafa Abdel-Qadir, was himself among the dead.
One body was completely charred and another torn to pieces by the blast, police said.
Police said that unexploded devices were also found at the site of Friday's blast, indicating that the farm apparently served as a bomb factory.
The government insists the Muslim Brotherhood, the movement of ousted president Mohammad Morsi, is involved in militant attacks. The Brotherhood says that it is a peaceful organization.
The explosion, in a village in the rural Fayoum province, came hours after nine people were wounded when a small bomb went off in a train in the Mediterranean city of Alexandria.
Islamists had staged protests Thursday to mark the first anniversary of the military ousting Morsi, with two people killed in clashes between demonstrators and police.
The Brotherhood had called for a "day of anger" to commemorate Morsi's overthrow, which unleashed a deadly crackdown on the Islamist movement.
The government has since designated it a "terrorist" group.
Despite the Brotherhood saying that it is committed to peaceful protest, there have been indications that some members have been involved in attacks on security forces during the crackdown that has killed at least 1,400 people and imprisoned thousands.
Scores of policemen and soldiers have been killed in bombings and shootings since Morsi's overthrow, mostly in the restive Sinai Peninsula.
The deadliest attacks have been claimed by militant groups ideologically similar to Al-Qaeda, and which have no proven links to the Brotherhood.