A bomb blast hit a government office Thursday afternoon in Egypt's Nile Delta, leaving two injured, Aswat Masriya reported.
Unknown assailants on a motorbike threw a bag containing a bomb near the municipal governor's office in Gharbiya governorate, north of Cairo.
Two security personnel were wounded in the bombing, including Gharbiya security chief, Mohamed Rizk, and a security guard. One of the men is said to be in a critical condition.
Attacks and bombings targeting security forces have been commonplace in recent months in Egypt amid an Islamist insurgency against the government.
Late in September, a bomb blast near Egypt's foreign ministry headquarters in downtown Cairo killed two policemen, after a month-long lull in violence targeting the capital.
Militants based in the Sinai Peninsula have killed hundreds of police and military personnel since, with some Jihadist groups claiming they are avenging a state crackdown that killed hundreds of Islamists and jailed thousands of others.
Their attacks have also led to civilian casualties.
Authorities say several militant cells have been eradicated as troops continue to combat fighters in the mountainous region.