Williams was abducted on his way to Kaduna from Abuja to attend the passing out ceremony of military officers at the Armed Forces Command and Staff College in Jaji, outside Kaduna.He was abandoned by his abductors along the Abuja-Kaduna Highway, the same place where he was kidnapped, by his abductors.
Nelson was abducted along with his driver on Thursday on his way to Kaduna to attend a function at the Armed Forces Command and Staff College.
But his driver was released almost immediately.
But Don Awunah, spokesman of the police, said the diplomat was released around 4pm on Tuesday.
Awunah said following credible intelligence, there was intense police activities on both land and air patrol within the area where he was captured.
He said Williams was in good condition and had been reunited with his family.
The police spokesman did not comment on whether any ransom was paid, but the kidnappers had earlier demanded $40 million in exchange of his release.
Williams was a former chief of defense staff in his country.