Sporadic exchange of gunfire and explosions were heard late on Sunday night in Al-Hasaba district, the scene for the deadly clashes between the government forces and tribal fighters loyal to Sadeq Al-Ahmer, the sheikh of the most powerful tribal coalition in Sana'a, Hashid, last week.
The fighting comes as the truce reached two days go was holding on.
Residents said there is fighting and they could not sleep because there were explosions just like to those of RPGs or bombs.
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