Some ballot boxes at Polling Unit 18 of Ohafia/Ago Palace Way, Okota in Oshodi/Isolo LGA of Lagos State, have been set on fire.
The thugs who committed the arson also attempted to force voters to thumbprint for a particular candidate, reports say.
The News Agency of Nigeria correspondent who witnessed the incident reports that the Polling Unit 23 located on Baba-Ewe Street/Ago Place Way was also affected by the fire.
INEC ad hoc staff at the polling units as well as voters who came out to cast their votes ran away from the polling centres for safety.
A team of the Special Anti-Robbery Squad of the Lagos State Police Command arrived the scene shortly to apprehend suspects.
As at the time of this report, INEC ad hoc staff and voters were yet to return to the units.
Also, at Polling Units 035 and 036 located at Adeneken Street/Alhaji Olusesi Street Junction and Adeneken Street/Olusesi, Ago Palace Way, Lagos, respectively, a group of young men in tricycle and a motorcycle disrupted the exercise by attempting to force a particular candidate on the voters.
A team of SARS intervened, shooting into the air and made some arrests.
The Lagos state Commissioner of Police, Mr. Zubairu Muazu, confirmed the crisis at Okota, saying that he had ordered the Area Commander to be on top of the situation.