The Associated Press

LANSING, Mich. (AP) - Michigan Lt. Gov. Brian Calley is planning to meet with government officials and business leaders during a two-day visit to Mexico.

Calley was expected to leave Sunday on the mission to strengthen trade relations and attract job-creating investments to Michigan.

He will meet Monday with Mexican government officials and visit the U.S. Embassy in Mexico City. Calley also will speak with Mexican-based auto supplier Rassini.

COVERT TOWNSHIP, Mich. (AP) - Operators of the Palisades Nuclear Power Plant in southwestern Michigan say they removed it from service because of a water leak.

The plant operators say they took the plant off line Sunday morning for inspections and repairs to the safety injection/refueling water tank. They say there is no risk to the public.

The plant is along Lake Michigan's shoreline in Van Buren County's Covert Township, about 80 miles east-northeast of Chicago.

LANSING, Mich. (AP) - Gov. Rick Snyder is urging residents to help prevent arson fires in Michigan's communities.

Snyder has proclaimed May 5-11 Arson Awareness Week in Michigan. This year's theme is "Reducing Residential Arson."

The state says that residential arson fires throughout Michigan resulted in more than $10 million in property losses last year. There were 782 residential arson fires in the state in 2012.

ANN ARBOR, Mich. (AP) - Twitter chief executive Dick Costolo took a picture of thousands of graduates at the University of Michigan - and then tweeted it, of course.

Costolo joked to the crowd that it "should only take a second." The Michigan alumnus was back on campus Saturday to receive an honorary doctor of laws degree. He told graduates to be bold, figure out what they love to do and "go do that."

LANSING, Mich. (AP) - A federal appeals court has no problem with a Michigan law that bars a presidential candidate from running in the general election after losing in the primary for another political party.

The lawsuit was filed by the Libertarian Party after the secretary of state kept Gary Johnson off the ballot last fall. He'd lost earlier in 2012 as a candidate in Michigan's Republican Party primary.

A three-judge panel at the 6th U.S. Circuit Court of Appeals in Cincinnati said Wednesday that Michigan's law is constitutional.

The ruling affirms an earlier decision by Detroit federal Judge Paul Borman.