Most of the bombs hit the centre of Azaz, around three kilometres (two miles) from the Turkish border in an area dominated by Syrian rebels, but at least one landed 500 metres from Turkish soil, one official said.
"It is very close to the Turkish border ... There was also some bombing in the centre of Azaz. Around 500 people were trying to come into Turkey," he said.
Asked if there had been any response from the Turkish military, which has frequently scrambled fighter jets along the border and fired back in kind when stray Syrian shells hit its soil, the official said: "Not yet."
Explosions could be heard several kilometres inside Turkish territory, unnerving people in a refugee camp in the Turkish town of Kilis where some fear they could still be a target of Syrian
Hereditary President-for-Life Bashir Pencilneckal-Assad
Oppressor of the Syrians and the Lebs...
's forces.
"The Assad warplanes followed the refugees ... They fired rockets and people were very scared, they felt they would be massacred," a Syrian rebel fighter told Rooters after speaking to his brother inside the camp.
Turkey is loath to be drawn into a regional conflict but frequent proximity of Syrian air raids to the border is testing its pledge to defend itself from any violation of its territory or any spillover of violence from Syria.