Nigeria, Aug. 19 -- The presidency on Monday explained why it queried the chairman of the revenue agency, FIRS, Tunde Fowler.

PREMIUM TIMES reported the query sent to Mr Fowler by the Chief of Staff to President Muhammadu Buhari, Abba Kyari.

In the letter, Mr Kyari asked Mr Fowler to explain why government revenue under Mr Fowler has always been less than projected revenue and why the revenue has dropped compared to what obtained under ex-President Goodluck Jonathan.

Mr Fowler's response was expected on Monday. Presidential sources said he has responded to the query.

On Monday, however, the presidency explained that the query to Mr Fowler does not mean that he is being investigated.

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