Topeka ? Security and surveillance have increased across Kansas following President Bush’ ultimatum to Iraq and the raising of the nation’s terror alert status, the state’s homeland security director said Tuesday.

Maj. Gen. Greg Gardner ordered 24-hour staffing for the military emergency operations center, which oversees the activities of National Guard troops. Local officials closed access to Coffey County Lake, adjacent to the Wolf Creek nuclear power plant near Burlington.

Gardner, who also is the state’s adjutant general and director of emergency management, said soldiers already were protecting the state’s three federal military installations. Increased security at the state’s armories is being considered.

Gardner and Gov. Kathleen Sebelius participated in a conference call with Homeland Security Secretary Tom Ridge just before Bush addressed the nation Monday night. Ridge outlined the potential for terrorist attacks against U.S. interests, primarily overseas. States were encouraged to take steps to secure vital industries and infrastructure.

About 1,200, or 18 percent, of the state’s National Guard troops have been called to active duty, Gardner said, which ranks in the lower middle when compared to other states in terms of percentage mobilized.

“There’s plenty left to handle anything that happens in Kansas,” Gardner said.