Syrian helicopters bombarded several neighbourhoods of the northern city of Aleppo on Friday (July 27th), AFP reported.
According to the Syrian Observatory for Human Rights, the army used helicopter gunships in the city's southwestern neighbourhoods of Salaheddin, Bustan al-Qasr, Sukari, al-Mashhad and al-Azamiya.
Troops also clashed with opposition forces in the central Jamiliya district, as well as in Mahatat Baghdad and in Saadallah al-Jabiri Square, the Observatory reported.
"I'm seriously concerned by the escalating violence in Aleppo," United Nations Secretary-General Ban Ki-moon said during a visit to London for the Olympic Games. "I urge the Syrian government to halt the offensive."
The new violence follows concerns from Western leaders over the Syrian military's build-up outside Aleppo, with many imploring the regime to express restraint.
"I am deeply concerned by reports that the Syrian government is amassing its troops and tanks around Aleppo," said British Foreign Secretary William Hague, adding that "the conflict could lead to a devastating loss of civilian life".
French foreign ministry spokesperson Bernard Valero said, "We call on the regime to end the violence and to cease the use of heavy weapons."
Italy also called on Friday for "maximum pressure" to be exerted on President Bashar al-Assad "to ward off a new massacre", according to a statement by Italian Foreign Minister Giulio Terzi.
Meanwhile, in Idlib province, the Observatory reported continuous government shelling in the town of Maaret al-Numan. It said Syrian opposition forces captured 50 troops, including 14 officers.
Friday's violence follows the deaths at least 164 people on Thursday, including 84 civilians, the Observatory said.