U.S. has concerns about Iran-Russia oil-for-goods swap reports

WASHINGTON (Reuters) - The White House said on Monday it was concerned about a recent report that Iran and Russia are negotiating an oil-for-goods swap worth $1.5 billion a month, a deal a spokeswoman said could trigger U.S. sanctions.

Such a deal would significantly boost Iran's oil exports, which have been slashed by more than half to about 1 million barrels a day by U.S. and European economic sanctions aimed at forcing Iran to accept curbs to its nuclear program.