He said the interrogation of the suspects led to the recovery of additional exhibits linked to the case.
He urged members of the public to continue to support the police with timely and credible information.
He said the suspects were unable to offer a lawful explanation or satisfactory account regarding the ammunition found in their possession.
The suspects were arrested during a stop and search operation along the expressway on Wednesday.
The enforcement operation targets unmarked vehicles, fake or obscured number plates, and the unauthorised covering of vehicle plates.
The gunmen attacked two immigration officers at about 8:45 p.m.
The police announced on Wednesday that operatives have begun an investigation into the kidnapping of former power minister Adebayo Adelabu’s sister and nephews.
Mr Olayinka stated that the suspects were cooperating with investigators as inquiries progress.
The command cautioned residents of the state against spreading false news.
The police spokesman said preliminary findings showed that about six armed men invaded the facility and whisked the victims away to an unknown location.
