riyadh/doha u.s. secretary state rex tillerson say sunday time iranian-backed militias iranian advisers help iraq defeat islamic state go home rare joint meet leaders iraq saudi arabia unite state concern iran shi ite regional power take advantage gain iraq syria expand influence gain u.s. invasion 2003 something sunni arab rival riyadh also oppose iranian militias iraq fight daesh isis come close militias need go home foreign fighters iraq need go home allow iraqi people regain control tillerson say joint news conference saudi foreign minister adel jubeir tens thousands iraqis heed call arm 2014 seize third country territory form popular mobilization force pmf receive fund train tehran declare part iraqi security apparatus senior u.s. official say tillerson refer pmf quds force foreign paramilitary espionage arm powerful islamic revolutionary guard corps irgc iranian foreign minister mohammad javad zarif berate tillerson remark influence iran oil-rich regional rival saudi arabia exactly country iraqis rise defend home isis return zarif say tweet shameful us fp foreign policy dictate petrodollars iraq military arm unite state support pmf eject ultra-hardline sunni muslim militant group mosul cities northern iraq year several thousand u.s. troop still country mostly train also carry raid campaign uproot militants leave whole cities ruin hit iraq economy new joint ministerial-level body iraq saudi arabia convene inaugural meet early sunday coordinate fight rebuild iraqi territory wrest group jubeir emphasize historic tie two neighbor share border vast oil resources many tribes natural tendency two countries people close centuries interrupt number decades try make lose grind say rare senior meet signal thaw state loggerheads decades also attend saudi king salman iraqi prime minister haider al-abadi tillerson say council would contribute reform build iraq private sector encourage foreign investment critical win peace earn hard-fought military gain say state media say council express satisfaction global oil market recovery result deal countries boost price limit production council also agree reopen saudi basic industries corp office iraq grant saudi agriculture company salic investment license second meet hold baghdad date mention saudi commerce investment minister majid al-qusaibi tell reuters country seek boost export eye investment opportunities iraq agricultural petrochemical sectors among others say back high level governments would produce quick result grind let cry spill milk whatever happen past happen good news toward build prosperous beneficial future countries say telephone interview tillerson jubeir also discuss washington hawkish new policy towards iran include possible withdrawal 2015 nuclear deal new sanction irgc countries believe conduct business iranian revolutionary guard entities european company company around world really great risk tillerson say relations riyadh baghdad cut 25 years recent rapprochement former iraqi president saddam hussein invade kuwait 1990. saudi arabia along unite arab emirates woo baghdad effort halt grow regional influence iran arrive doha late sunday next leg multi-country trip tillerson tell news conference little chance swift breakthrough resolve blockade impose qatar saudi arabia arab ally kingdom unite arab emirates egypt bahrain impose trade travel curb doha june allege support terrorism friendship iran charge qatar deny strong indication party ready talk yet tillerson say secretary state six-day trip also take pakistan india switzerland go home tillerson tell iranian-backed militias iraq