Foreign minister Geoffrey Onyeama, however, said those willing to return home may do so when Ukrainian airspace reopens for civil aviation traffic.
Footage circulated online shows Ukrainians and foreign nationals at ATMs, airports, and train stations trying to flee the country.
Mr Isiaka testified as a police investigator in an ongoing trial of Chidinma Ojukwu, the prime suspect in the murder of Mr Ataga.
During the interrogation by Lagos officials, the teacher confessed that the child was beaten by her because she was distracting the class.
Construction workers were on site when the building collapsed, trapping the workers.
The incident occurred Saturday afternoon while workers were working at the site.
The teacher excused her action stating that other students received 24 strokes each, while the child was not seriously flogged.
The unidentified graduate who died in the crash was at the school for clearance.
