Via Canada.com

WASHINGTON (CP) - Canada's sweeping anti-terror arrests constitute high-profile proof the country's "on the job" when it comes to security, U.S. officials said Sunday as they praised cross-border safety co-operation.

"It's obviously a very great success for the Canadian counterterrorism efforts, which we know have been very robust," said Secretary of State Condoleezza Rice. "They're to be congratulated for it.

"Really since Sept. 11, Canada has been very active in the war on terror."

But the breakup of a so-called homegrown terror cell with a huge cache of fertilizer used to make bombs also sparked renewed charges that the border's too porous and Canada's become a haven for terrorists because immigration laws are too lax.