Thu Mar 8, 2012 5:40pm EST* White House says no agreement...

Thu Mar 8, 2012 5:40pm EST
* White House says no agreement reached on arms request

* Netanyahu told Obama no decision on Iran attack made (Adds U.S. comments, paragraph 6)

(Reuters) - Israel has asked the United States for advanced "bunker-buster" bombs and refueling planes that could improve its ability to attack Iran's underground nuclear sites, an Israeli official said on Thursday.

"Such a request was made" around the time of Israeli Prime Minister Benjamin Netanyahu's visit to Washington this week, the official said, confirming media reports.

But the official, who spoke on condition of anonymity given the sensitivity of the issue, played down as "unrealistic" Israeli reports that the United States would condition supplying the hardware on Israel promising not to attack Iran this year.