BEIRUT - Air strikes on rebel-held areas of Aleppo and shelling of government-held areas of the city resumed on Friday, after a brief dawn lull following seven days of violence, a war monitor, a civil defense worker and Syrian state media said.At least one child died and five people were injured in air strikes on Friday on rebel-held areas, the Syrian Observatory for Human Rights said.The strikes come on the same day as Russian state media said a "regime of silence" agreement in Syria sponsored by Russia and the United States will apply for 24 hours in Damascus and the surrounding area and 72 hours in Latakia.Bebars Mishal, a civil defense chief working in rebel-held areas of Aleppo told Reuters there were a number of air attacks this morning, many of them around mosques in rebel-held areas. Mishal said one hit a clinic in Aleppo's Al-Marja district.Syrian state television said people had been wounded and a building set on fire during shelling of government-held quarters of Aleppo on Friday.