Senior Russian officer dies from wounds in Syria's Aleppo

Smoke rises after rebel fighters launch a mortar shell on residential neighborhood in west Aleppo, Syria, Monday, Dec. 5, 2016. The government seized large swaths of the Aleppo enclave under rebel control since 2012 in the offensive that began last week. The fighting was most intense Monday near the dividing line between east and west Aleppo as government and allied troops push their way from the eastern flank, reaching within less than a kilometer (half a mile) from the citadel that anchors the center of the city.(AP Photo/Hassan Ammar) (The Associated Press)

In this picture taken Monday, Dec. 5, 2016, a Syrian man walks by posters of Syrian President Bashar Assad with Arabic that read "Homeland, honor, fidelity. Together we will build it," in Aleppo, Syria. A Syrian war monitoring group says government forces have captured large parts of Aleppo's central-eastern al-Shaar neighborhood from rebels. The Britain-based Syrian Observatory for Human Rights says government forces took most of the once-populous neighborhood Tuesday following intense clashes. (AP Photo/Hassan Ammar) (The Associated Press)

The Russian defense ministry says a Russian colonel who worked as a military adviser in the government-controlled part of the Syrian city of Aleppo has died in rebel shelling.

The fatality marks Russia's third casualty this week, after two nurses were killed in a rocket attack on a makeshift Russian military hospital in Aleppo.

The ministry said in a statement on Wednesday that Col. Ruslan Galitsky was wounded in rebel shelling of a government-controlled neighborhood several days earlier and has died of wounds.

The Syrian government and its ally Russia have rejected a cease-fire for the war-torn city, keeping up the military offensive amid rebel retreats and massive displacement of Aleppo civilians.