ABUJA, June 4 (Reuters) - Nigeria filed charges against Pfizer <PFE.N> on Monday seeking $6.95 billion in damages for the drugmaker's alleged role in the deaths of children who received an unapproved drug during a meningitis epidemic.

Nigeria alleged in papers filed at a Federal High Court in the capital Abuja that Pfizer, the world's biggest drugmaker, did not obtain approval from the relevant regulatory agencies and acted unethically when it tested the antibiotic Trovan in the northern Muslim state of Kano state in 1996.

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