. >> reporter: houthi fighters hold ground in the southern ci city.ent troops have retreated. outgunned and out numbered, they are waiting for reinforcements. >> houthis are still capable of sending fighters and ammunition from sanaa to the main front likes in taiz. >> reporter: seven months after the start of the saudi-led airstrikes, houthi fighters are far from defeated. they have attacked a saudi military post in the border to town. after hours of fighting the houthis took control of the military post. destroyed armored vehicles before retreating. as the fighting continues across yemen, more civilians are continue to go die, including family members when their car was attacked on a busy road. >> translator: a few rockets fell on taiz city fired by the houthis, a boy and a girl and their father were killed. the mother survived, but she is in serious condition. >> reporter: local activists blame the houthis and forces loyal to former president saleh. the continuing fighting threatens to undermine efforts to get yemen's warring factions to agree on a