Three sources have provided different death tolls from the barrel-bombings in Aleppo. Disparate casualty figures are common in the Syrian conflict, especially in the immediate aftermath of big attacks.
An activist group called the Local Coordination Committees said at least 25 died. The Britain-based Syrian Observatory for Human Rights said at least 27 died.
And an Aleppo-based activist, Ahmad al-Ahmad, said 47 were killed in all. He said 27 died in or near a crowded bus, while 10 others were killed as they waited to collect water from a public tanker, and 10 more died later as ambulances ferried scores of wounded to hospitals.
The Aleppo attack coincided with a wider government offencive against rebel positions across Syria, where the brutal civil war has lately been overshadowed by the rampage by militants from the Islamic State group, which has captured large swaths of territory both in Syria and neighbouring Iraq.
The United Nations estimates that more than 220,000 people have been killed in Syria's nearly 4-year-old conflict.