Even as it pursues its $1.9 billion hostile bid to take over Dime Bancorp, North Fork Bancorp is keeping busy on the acquisition front.

John Adam Kanas, chairman and chief executive officer of $15 billion-asset North Fork, said he is mulling whether to bid on smaller local rivals, including $3 billion-asset Haven Bancorp in Waterbury, N.Y. Mr. Kanas said he has received a copy of materials - known to deal-makers as the "book" - that Haven's investment banker has been circulating to potential buyers.

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