Syrian activists said Sunday overnight fighting between rebels and government forces has killed at least three people in Aleppo, the country's most populous city.

Earlier, a fire sparked by battles between the two sides has destroyed shops in Aleppo's historic, centuries-old marketplace.

Rebels announced a new offensive against government troops in Aleppo on Thursday, but it appears that neither side has made significant gains.

The Syrian Observatory for Human Rights says violence across Syria killed at least 45 people Saturday.