TRIPOLI (AFP) - Libyan officials showed reporters five bodies, including two toddlers, they said were among nine civilians killed in a "barbaric" Nato air raid on Sunday, as pressure mounted on the alliance to allow a political solution. Government spokesman Mussa Ibrahim accused the Western alliance of "deliberately targeting civilians," insisting there were no military targets anywhere near the residential neighbourhood of Tripoli that was hit. "Nato is looking into this matter," said alliance spokesman Wing Commander Mike Bracken in Brussels. "Nato was operating in Tripoli last night, conducting air strikes against a legitimate military target. "Nato deeply regrets any civilian loss of life during this operation and would be very sorry if the review of this incident concluded it to be a Nato weapon," he added. If it is confirmed the civilian deaths were caused by Nato, it would be an embarrassment for the alliance which has led the bombing campaign under a UN mandate to protect civilians. Ibrahim demanded that the alliance end its "aggression" to pave the way for dialogue, speaking just hours after organisations including the Arab League, the European Union and the United Nations highlighted the importance of "accelerating the launch of a political process" to end the conflict. Journalists were taken to the Al-Arada district of Tripoli before 1 am (2300 GMT Saturday) to see rescue teams and bystanders desperately searching for survivors among the wreckage of a two-storey block of flats. An AFP correspondent saw two bodies pulled from the rubble. Journalists were then taken to a Tripoli hospital where they were shown the bodies of a woman and two toddlers who officials said were members of the same family and had died in the raid. Ibrahim said four passers-by were also killed, bringing the death toll to nine, and that 18 people were wounded. "It is another night of massacre, terror and horror at the hands of Nato," Ibrahim charged. Western leaders "are morally and legally responsible for these murders," he said. "This is not propaganda. It is not something that we can stage." The alleged civilian casualties in the capital come amid mounting international pressure on Nato to seek a negotiated solution as the frontlines show little movement despite the protracted bombing campaign. After talks in Cairo on Saturday, the African Union, Arab League, European Union and United Nations issued a joint statement on the importance of "accelerating the launch of a political process that responds to the legitimate aspirations of the Libyan people." EU foreign policy chief Catherine Ashton attended the meeting along with outgoing Arab League chief Amr Mussa and African Union head Jean Ping, while UN chief Ban Ki-moon joined by live video link. Ban said the roots of a negotiating process were showing but that the international community needed to give a "consistent message" on a political solution with Gaddafi. His comments came after both Libyan Prime Minister Baghdadi al-Mahmudi and Russian envoy Mikhail Margelov insisted that contacts were under way between the two sides - despite furious rebel denials. "Ask the Egyptians, French, Norwegians and Tunisians for information. They will tell you the truth," Mahmudi said. "We are sure of our meetings and everything has been recorded." Margelov said after visiting Tripoli that Gaddafi's regime had forged multiple contacts with the Libyan rebels' National Transitional Council in foreign capitals including Berlin, Paris and Oslo. But the NTC denied there were any talks. "I can assure you there is and there was no negotiation between the NTC and the regime," said the council's head of international affairs, Mahmud Jibril.