the International Atomic Energy Agency official says extending deadline is an option . Iranian foreign minister is heading to France for the talks , state media report . Russian agency cites unidentified official as saying deal `` impossible '' before deadline . Both sides appear to leave open the possibility of a further extension beyond Thursday .
State Department official says extending deadline is an option . Russian foreign minister is heading to Austria for the talks , state media report . Iranian agency cites unidentified official as saying deal `` impossible '' before deadline . Both sides appear to leave open the possibility of a further extension beyond Monday .