The FBI and Homeland Security Department say there is no information indicating plans for more shooting sprees at movie theaters around the country.

According to an intelligence bulletin obtained by The Associated Press, investigators have not figured out the suspected shooter's motivations for killing 12 people and injuring others during a midnight showing of the new Batman movie in a suburban Denver theater.

Security at some movie theaters around the country has been increased after the deadly attack in Colorado. And some events around the world for the premiere of the new Batman movie have been cancelled or scaled back.

Shortly after the shootings, police arrested James Holmes, a 24-year-old former neuroscience graduate student.

The intelligence bulletin, dated July 20, was distributed to law enforcement officials around the country.

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