rtokens: A U.N. official in Baghdad said the KDP , backed by Iraqi tanks , heavy artillery and helicopters had taken control of the main northern Iraqi city of Arbil after fighting on Saturday .
pos: NNP VBD PRP VBD RB VB IN EX VBD DT NNS .
tokens: Nerweyi said he did not know if there were any casualties .
ltokens: " They were far too strong , " he said .