Iran's Foreign Minister Manouchehr Mottaki held talks in Nigeria with his counterpart on Thursday, a spokesman said, ILNA reported.
The Nigerian foreign ministry spokesman did not provide details on the talks.
"A meeting was indeed held today between the foreign minister of Iran and the Nigerian foreign minister," said ministry spokesman Ozo Nwobu.
"The meeting was over a crucial bilateral issue between the two countries."
Nigeria's minister, Odein Ajumogobia, planned to brief journalists on Friday morning, he added.
The foreign minister, Manouchehr Mottaki, has pledged his government's cooperation with an investigation into the shipment of weapons, said the Nigerian
foreign minister, Odein Ajumogobia.
"I had a productive meeting with the Iranian foreign minister this evening, and he has assured us of his government's cooperation in our ongoing investigation regarding the arms shipment," Mr. Ajumogobia said in a telephone interview.
Nigeria's secret service intercepted the shipment two weeks ago and found that it contained rockets and other explosives.