OAKLAND, Calif. (AP) - Oakland officials say cell phone towers are partially to blame for disrupting the city's police radio communications system, including a failure on the night President Obama came to town.

The San Francisco Chronicle reports that AT&T Wireless towers were interfering with the radio system used by police and firefighters on city streets, especially when personnel were close to a tower.

AT&T Wireless says it is working with the city to see if the troubles with the radio system are related to the its network. The company released a statement saying as a "cautionary measure" they have taken some frequencies out of service at some cell sites in Oakland.

David Cruise, Oakland's public safety systems adviser, says the partial disabling of towers has already helped improve the radio system's performance.

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