BEIRUT — A year of Russian airstrikes in Syria have killed more than 9,000 people, displaced tens of thousands, and caused wide destruction, an opposition monitoring group said today.

On Sept. 30 last year, Russia began an air campaign backing Syrian President Bashar Assad, turning the balance of power in his favor in areas including the northern province of Aleppo and the suburbs of the capital Damascus.

Opposition activists have blamed Russia for most of the recent airstrikes against rebel-held neighborhoods of east Aleppo city that killed more than 320 civilians in past weeks.

The monitoring group that tracks Syria’s civil war said Russian airstrikes have killed 9,364 people.

The Britain-based Syrian Observatory for Human Rights said the dead include 3,804 civilians, including 906 children. The dead also include 2,746 members of the Islamic State group and 2,814 from other rebel and militant groups, including al-Qaida’s affiliate in Syria.

Syria’s military and the Observatory said government forces captured a hospital in the northern city of Aleppo a day after regaining control of a Palestinian refugee camp in the city.