Security forces are surrounding Al-Zawr area in Serwah district, Marib, after tribesmen tried to bomb an oil export station, the September website has reported.
Security cordon is being imposed at main roads banning the people from entering and leaving the area, it said.
On Friday tribesmen from Al Tuaiman clan fired an RPG that landed at the station located in Kawfal area but no damages or casualties occurred.
The missile was fired in retaliation for killing a tribesman who in the hands of security forces.
The family of the victim had met with President Ali Abdullah Saleh and told him about the murder.
President Saleh then ordered the concerned authorities to resolve it and bring those responsible for justice but the clan said Saleh's orders were ignored.