UK's Cameron believes ex-aide under investigation

LONDON - British Prime Minister David Cameron said on Friday he believed that his former communications chief Andy Coulson was being investigated over allegations of phone hacking during his time as editor of the News of the World.
"He is now, as I understand it, under police investigation, as others will be," Cameron told a news conference.
"That police investigation has got to go ahead unhindered, without fear or favor as I said."
An unconfirmed report earlier said Coulson, who resigned from his government communications role in January, was at a London police station.