A video posted on the internet by opposition activists shows bodies lined alongside what they said was the Queiq River in the rebel-held Bustan al-Qasr neighborhood of Aleppo.
The Queiq River rises in Turkey and travels through government-held districts of Aleppo before it reaches Bustan al-Qasr.
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Police say several people have been wounded in a stabbing in Turku in western Finland.
Longer spells of rain across eastern Scotland with a weather warning in place until 6pm.
Julian Cadman, who is thought to have dual British-Australian nationality, became separated from his mother who was injured in the attack.