As many as 300 dead in latest Boko Haram attack. 

Details emerged Wednesday of an apparent Boko Haram attack on a Nigerian village in which at least 150 people died, the latest in a series of attacks and abductions of schoolgirls attributed to the group.

Militants dressed in military uniforms, backed by armored personnel carriers and shouting "God is great" attacked Gamboru Ngala Monday afternoon, firing rocket-propelled grenades and tossing improvised bombs into a crowded outdoor marketplace, witnesses told CNN Wednesday. They then set fire to buildings where people had tried to take shelter from the violence, the witnesses said.

The fighters also attacked the police station during the 12-hour assault, initially facing stiff resistance. They eventually used explosives to blow the roof off the building, witnesses said. Fourteen police officers were found dead inside, they said.

The final death toll could be closer to 300, Nigerian Sen. Ahmed Zanna told CNN.