baghdad kurdish authorities say friday send thousands troop kirkuk confront threats iraqi military attack also slightly pull back defense line around dispute oil-producing area ease tensions baghdad central government take series step isolate autonomous kurdish region since overwhelm vote independence sept. 25 referendum include ban international flight go baghdad tough line rule talk seek kurds unless renounce breakaway move back neighbor turkey iran sizable kurdish minorities turkey case long-running kurdish insurgency tens thousands kurdish peshmerga soldier station around kirkuk time another 6,000 arrive since thursday kosrat rasul vice president kurdistan regional government krg say washington u.s. defense secretary jim mattis say friday situation full attention unite state work ensure escalate turn right want go shoot situation mattis say issue longstanding case ... go recalibrate move back way solve politically work compromise solutions krg security council express alarm late thursday call significant iraqi military buildup south kirkuk include tank artillery humvees mortar force approximately km 1.9 miles peshmerga force intelligence show intentions take nearby oilfields airport military base say statement kurdish security source late say peshmerga shift defense line km 1.9 miles 10 km south kirkuk reduce risk clash iraqi force move vacate position without incident area peshmerga withdraw populate mainly shi ite muslim turkmen many loyal shi ite led-government baghdad affiliate iranian-backed political party paramilitary group iraqi military spokesman say military movements near kirkuk aim inspect secure nearby region hawija recapture islamic state militants week ago iraqi prime minister haider al-abadi repeatedly deny plan go actually attack territory kirkuk city one million people lie outside krg territory peshmerga force deploy 2014 iraqi security force collapse face islamic state onslaught peshmerga deployment prevent kirkuk oilfields fall jihadist hand krg prime minister nechirvan barzani urge unite state european union u.n. security council rapidly intervene prevent new war germany traditionally good relations baghdad krg call measure defuse tensions would like ask meet responsibilities escalate conflict german government spokesman steffen seibert tell reporters berlin president tayyip erdogan spokesman say thursday ankara would gradually close border cross northern iraq coordination central iraqi government iran turkish prime minister binali yildirim expect baghdad sunday talk abadi iraq 's kurds beef move back defense line around oil-rich kirkuk