Cairo: Bombs exploded outside the offices of cell phone companies and a restaurant in the Egyptian capital on Thursday, wounding two people, one of them seriously, police said.
Bombs went off outside two offices of British firm Vodafone and a branch of United Arab Emirates-owned Etisalat, damaging the store fronts but causing no casualties, an Interior Ministry spokesman told a news agency.
The branches were closed at the time of the explosions.
A fourth bomb, outside a pizzeria, wounded two restaurant staff, one of them seriously, General Hany Abdel Latif said.
It was not immediately clear why the cell phone companies and restaurant were targeted, but Abdel Latif said authorities had been on the alert for attacks in the runup to parliamentary elections next month.
Militants have set off dozens of bombs in the capital since the Army overthrew Islamist president Mohamed Morsi in July 2013 and cracked down on his supporters, killing hundreds of protesters in street clashes.
Most of the bombs have been rudimentary and caused no casualties.
But several have killed policemen, including two senior officers killed while attempting to defuse bombs planted outside the presidential palace in June last year.
In the Sinai Peninsula where they are based, militants who have pledged allegiance to the Islamic State group have killed scores of soldiers and policemen since Morsi`s overthrow.