Description:Amateur video footage uploaded to a social media website purports to show the Syrian city of Homs under heavy bombardment. Reuters cannot independently verify the contents of the footage. Activists say at least 16 people were killed and some 340 wounded on Tuesday during a heavy artillery barrage. One activist in the Baba Amro district told Reuters that "Several shells are falling each minute", adding that two children were among the victims. (1:38)