Nigeria has urged Indonesia to spare the lives of three of its citizens facing execution after being convicted of drug trafficking.
The plea comes as Australia also pursues diplomatic avenues to save the lives of Bali Nine pair Andrew Chan and Myuran Sukumaran.
The Australians were moved from Bali to Nusakambangan - the island reserved for their executions - last week.
The three Nigerians are on death row, having lost their appeals in Indonesian courts against their convictions.
A senior official in the Nigerian foreign ministry, Danjuma Sheni, conveyed the country's plea for clemency to the Indonesian ambassador to Nigeria, Harry Purwato.
"We ... are very aware of the consequences of drug trafficking in your country, but we still want to put it on record and we still want to appeal to you and to your president to temper justice with mercy," Sheni told the envoy during a meeting.
Sheni said Nigeria was aware that the three convicted nationals had gone through Jakarta's judicial process "and their appeals to the president have been turned down".
He added that one of the three, Raheem Agbaje Salami, had been moved to an island and could be executed at "any moment".
"We want to appeal to you and through you to your government that this death sentence that may be carried out on Salami any moment from now should be converted to life imprisonment," said Sheni, the ministry's permanent secretary.
The Indonesian ambassador promised to pass Abuja's plea for mercy on to Jakarta for consideration.
Drug convicts from France, Brazil, the Philippines and Ghana are also currently facing execution in Indonesia despite repeated appeals for mercy from foreign governments.
Nigeria, Africa's most populous nation, officially still has the death penalty but it is rarely implemented.
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