Hundreds of migrants left on a bare floor after being transferred to a detention centre by Libyan authorities.
A few hours earlier, they had left a previous centre, Tarek el-Matar near Tripoli airport, after fighting erupted between rival militias.
According to Libyan media sources, the building they lived in was hit by a bomb during the violence.
The government denied these allegations. But the Libyan illegal immigration control agency has confirmed this.
According to a humanitarian official, up to 1,800 migrants may have evacuated the detention centre to an unknown destination.
Many have expressed concern since the UN mission in Libya announced the signing of a ceasefire agreement between armed groups involved in the fighting on Tuesday.
