Businesses at two shopping centers in Delaware County were evacuated because of bomb threats Friday night, police said.

The evacuations were ordered in Upper Chichester after 9 p.m. at the Larkins Corner Shopping Center and the Willowbrook Shopping Center.

A Philadelphia police helicopter was called in to check reports that someone with a box had climbed on the rooftops of several building, but no one was located. A bomb-sniffing dog was called to check a suspicious package in a Walmart store. The package was cleared. - Robert Moran