New York City's estimated bill for the upcoming terror trial has increased dramatically and could total in the hundreds of millions of dollars, well above the previous figure of $75 million, Sen. Charles Schumer said.

To cover the escalating costs for the trial of terror suspect Khalid Sheikh Mohammed and four others, expected to take place this year in federal court in Manhattan, Schumer (D-N.Y.) is asking that the Obama administration include a separate line in its upcoming fiscal year 2011 budget to cover the costs.

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Schumer is slated to hold a news conference Monday afternoon in Manhattan to announce his request.

Additional costs to the city will include overtime for the NYPD and security equipment and infrastructure changes needed to accommodate tightening of security around the courthouse complex in lower Manhattan, a spokesman for Schumer said.

City officials said the extra costs will be on top of the NYPD counterterrorism efforts.