LAGOS, Dec. 29 (Xinhua) -- Nigerian aviation officials on Monday intensified security across airports in the country as authorities increased checks on passengers, following the Christmas attempted terror attack on a U.S. plane by a Nigerian, Farouk Mutallab.

The aviation security officials also went into another round of security meeting to review their investigations on the attempt to detonate an explosive aboard a US aircraft en route Detroit, Michigan.

The airport security meeting had in attendance officials of the Federal Airports Authority of Nigeria (FAAN), Nigeria Air Force, Immigration Services, National Drug Law Enforcement Agency (NDLEA), the State Security Services (SSS), and other security officials working at the Lagos Murtala Muhammed International Airport.

Abdulmutallab is alleged to have boarded a plane in Lagos, Nigeria's commercial hub and transferred onto a trans-Atlantic flight at Amsterdam's Schiphol Airport in the Netherlands.

A competent security source told Xinhua on Tuesday that the closed door meeting reviewed latest developments on the terrorist attempt with a view to unraveling global efforts, spearheaded by the American government, to know how Abdulmutallab escaped security at airports.