Violence rages in Syria.
Amateur video said to be shot in Homs on Sunday purports to show Syrian government forces shelling the area.
Another clip appears to show a Syrian tank firing from an elevated position allegedly near a residential area of Houla.
Footage said to be shot in Deraa province claims to show a helicopter firing on Maraba.
Reuters is unable to independently verify the content of these videos, which have all been obtained from a social media website.
The violence comes as international mediator Kofi Annan holds talks with President Bashar al-Assad on Monday.
Sarah Sheffer, Reuters