He said access to the funds has been challenging as sanctioned states have stopped remitting levies amid the bloc’s growing tasks.
Mr Türk, in a statement, urged the generals to restore constitutional order immediately.
President Bola Tinubu and other leaders of the Economic Community of West African States (ECOWAS) are meeting on Thursday in Abuja.
“The secretary general is very concerned over the deplorable living conditions that President Bazoum and his family are reported to be living under.”
“I call for President Bazoum and his family to be immediately released, and for the preservation of Niger’s hard-earned democracy,” Mr Biden said.
The governors were awarded in recognition of their contributions to the promotion of bilateral ties between Niger Republic and Nigeria.
37 people, including women were killed by the gunmen while working on their farms.
President Buhari expressed his concern while condoling with the Nigerien president on the flooding disaster.
