LAGOS, Jan. 2 (Xinhua) -- The Nigerian National Drug Law Enforcement Agency (NDLEA) has intercepted 56.25 kg of heroin concealed inside car shock absorbers at the Murtala Mohammed International Airport in Lagos, it said in a statement on Saturday.

The car shock absorbers, which originating from Pakistan, were intercepted at the cargo section of the airport before the new year.

Mitchell Ofoyeju, the agency head of public affairs, said in the statement that a clearing and forwarding agent, Yekini Shittu, was being quizzed by the anti-narcotic agents over the incident.

The statement said an airport taxi driver, Kamoru Gbadamosi, had been declared wanted in connection with the unlawful importation of the substance.

"The seizures were the single largest of heroin made in 2009," the statement said.

"A drug cartel had wanted to smuggle the drug into the country on two separate occasions in November and December 2009 when NDLEA officials uncovered the plots," it added.

The statement expressed satisfaction with the success of "Operation West Bridge" under the Memorandum of Understanding between Nigeria and Britain.