Yemeni forces overnight shelled armed fighters supporting protesters in the southern city of Taiz, wounding six in the latest resurgence of violence in the city, the broadcaster Al Jazeera reported Wednesday.
Yemeni state television blamed opposition fighters for starting the fighting and said four government troops were wounded, DPA reported.
Taiz is among the cities that have been gripped by nearly nine months of protests demanding an end to President Ali Abdullah Saleh's 33-year rule.
Demonstrators thronged the capital, Sana'a, Tuesday night to call for international support for the Yemeni uprising. They demanded that Saleh and his family to be brought to justice and blamed him for Yemen's instability.
Two people were killed Tuesday in Sana'a and one person was wounded when forces loyal to Saleh shelled an area near a protest camp.
An estimated 650 protesters have died and thousands have been injured since February.