A rocket-propelled grenade has been fired at a state-owned satellite station in Cairo, wounding two people, security officials have said.
There was no immediate claim of responsibility for the attack.
Earlier, gunmen killed five Egyptian soldiers near the Suez canal as further violence swept the country.
Egypt has experienced widespread unrest since Mohamed Mursi was removed from office by the army in July.
More top news
The remarkable rescue of baby elephant Roi, who faced starvation after poachers killed its mother, was captured on film.
The judgment means obese workers in the UK could claim they are technically disabled and entitle them to benefits or to seek compensation.
As forensics examine the evidence in the school were 148 people, mainly children, where killed, students prepare to return to the classroom.