Without naming any states, he said it was "obvious" that some coalition members perceived the conflict as an opportunity for themselves.
He also urged Libyan leader Muammar Gaddafi to resign.
Scepticism about the coalition's aims has also been voiced at a session of the Russian parliament.
Turkey, Nato's only predominantly Muslim member and a key player in the Middle East, offered on Wednesday to send five ships and a submarine to join a naval operation to enforce an arms embargo off Libya.
However, the country has publicly questioned the wisdom of coalition air strikes.
"We saw in the past such [military] operations increasing the loss of lives," Prime Minister Recep Tayyip Erdogan said on Tuesday, pledging that his country would "never point guns at the Libyan people".
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