LONDON, Jan. 24 (UPI) -- British Minister for North African Hugh Robertson said Friday he condemned violence in Egypt as British residents there were advised to remain vigilant.
Robertson condemned bombings in Cairo that left at least four people dead and more than 70 injured.
"I call on all Egyptians to resolve their differences peacefully and to refrain from violence," he said in a statement following the attacks.
No group claimed responsibility for the bombings.
On Wednesday, the Muslim Brotherhood said it was calling for a show of unity ahead of the so-called January 25 revolution, a reference to the 2011 resignation of former President Hosni Mubarak.
The Muslim Brotherhood supported ousted President Mohamed Morsi, who in 2012 became Egypt's first president ever elected in a democratic contest. Pro- and anti-Morsi groups have clashed in the past.
The British Foreign and Commonwealth Office updated its travel advisory for Egypt, saying there were a number of organizations calling for demonstrations Saturday to mark the anniversary of the revolution.
"You are advised to take particular care in the vicinity of government buildings, and to avoid all demonstrations and large gatherings," the warning said.
Ahram Online, an Egyptian news website, reported one of Friday's explosions rocked the headquarters of the Cairo police. It published a statement from interim President Adly Mansour vowing to "severely punish" those who carried out the attacks.