Transcript for US, Turkey Planning 'Islamic State-Free Zone'

You can. No potential new partner in the fight against ice its report suggesting Turkey and the United States. At finalize the plan to create an Islamic state free zone across Syria's northern border with Turkey. Right now. A hot spot Syria. Hello everyone. In New York the plan entails using American air power Syrian insurgent. And Turkish forces working together to rid ice is militants from about. 68 mile long strip. Following this story for a ABC's Alex Marquardt in being your brut. Alex many moving parts here but start off here with how the mechanics of this Islamic state free zone will work exactly. Ideally as we noted it's about 68 miles long we don't know how deep it's going to be there have been various reports that'll be around forty miles. Into Syria from the other side of the Turkish border now keep in mind it is extremely long extremely porous border. Between Turkey and Syria it's about 560 miles but they are focusing on this section that's. Just about seventy miles or create what that what's being called a safe zone or anti ice zone essentially. A space that. Syrian rebels that US forces and in the sky. Fighter jets. And the Turks will attempts suit empty. Of all ice news fighters annual exams in Beirut they're the hope is that it will then be guarded. And populated by Syrians Syrian rebels leader ones on the ground doing the fighting make sure that crisis is kept away. Us that not only pushes ice is back from the Turkish border which is a made major concern for Turkey. I'd not only takes away some crisis territory which of course is a main goal. Or the Americans but it would also allow beer Turks say some Syrian refugees to go back into Syria remember that. There are one point eight million Syrian refugees in Turkey Turkey and more Syrian refugees and any other countries and that's the blueprint right now. But a lot of details need to be ironed out foremost among them one of the biggest questions for these Syrian rebels we're going to be on the ground. It's fighting against the ices forces they simply don't noted of course that there's a whole patchwork of different types of Syrian rebels. I just recently of the US train and Syrian rebels have gone back into Syria but there were just sixty up. Be the reports there were hearing are that they will be moderate rebels but that of course is subjective what the US considers being moderate is completely different know what. Turkey. Considers to be moderate so a lot of questions remain aimless. A lot of questions but Alex talking about why it took Turkey so long to get involved here again we're talking about fighting ice its target on its border. That's right Turkey has long been accused by the US and the west of not getting in ball in this fighter not standing up Eisner's in a way that it should as I mentioned a very long and porous border people accuse Turkey allowing. Fighters and weapons related crisis. Crossing that order and and the Turks essentially looking the other way. Turkey has been much more focused on bringing down president Bashar all a sought that's been their primary brokers and that's. What are the reasons that they have been more laid back about the people coming into their country. And going across that border that's one and is sticking points between the US and Turkey. That Turkey's been quite angry at Washington about that is accusing Washington of not being focus enough on ticking down president Charlotte's not. Now the same time. Cuts are a lot more to lose by cracking down on ice out all the ices fighters on the other side of the border some of integrity in solitary that order commence its or in carry out attacks. Ice sympathizers. Inside Turkey will be carry out attacks. And so this is the end result a lot of negotiating beats me operatic both Turkey. And Washington a lot of arm twisting and one of the main things that the US wants it with access sue the southern bases in Turkey from which state that launched drones are launched fighter jets. Into Syria to gets it cherry out. Missions against ice and that is part of this deal US will now be able to do that Turkey. Now has that support. By the US to go after prices on the others aren't reporters and it's a lot more comfortable. Well one big cheese factors that's not being talked about as much it in this deal. Is Turkey is now not only going after crisis but they're going after the Kurds now Turkey has been fighting with Kurdish separatists internally. For decades. There's been a fragile truce in place for the past two years. That has now been shattered because not only is Turkey bombing ice positions but they're bombing Kurdish position. Inside a rock. I am so. Not all so this is a bear creek complex situation it's also very dangerous situation for Turkey because they're now going after groups that are. Highly armed a pretty easily now come back and carry out attacks insides are. And Alex to be clear here we're talking about. Syria safe. Zone not necessarily a no fly zone talked about why the US has been so reluctant to create a no fly zone along the border. Well no fly zone is a military operation carries with it Aries this street. Implications. Foremost among them of course not allowing anything else to lie it reads in that zone. So that would mean that if Turkey and the US imposed a no fly zone over that area inside Syria if they would essentially be authorized encouraged and would shoot down anything that was lying. In that area that means Syrian warplanes. And that is not something. That the US is willing to do right now imagine a situation in which a Syrian warplane. A fighter jet were in that space shot down by the Turks or the American. That would create a huge. That treat huge consequences that the US right now it does not want the deal would. But it's an extremely important questions are raised because. The way that the US and Turkey imagine nest is that they're going to be Syrian rebel fighters on the ground. In that safe zone those are the kinds of people that the Syrian regime wants to go roster so it's going to be. Very touchy area meets very complicated we don't know what's gonna happen. If a Syrian fighter jet were ordered to go in there and start attacking inside this saves on how the US or respond. Very complicated indeed and finally Alex then how to Syria's president aside at. Fit into all of this. Well eighties they were present aside actually went on TV yesterday gave his first public speech in a year and it was remarkable for how race you. She admitted that the Syrian army had suffered. Huge losses. I'm Ed we admitted that the army had been weekends he admitted that the army has now at suits focus. On certain areas aren't holding certain areas with their forces. That remain. And these are. Strategies that are believed to have been. Dictated to him essentially by Iran is main backers by Hezbollah the militant group here in Lebanon. Rich. It is. Which is weren't as mean supporters now. Of course aside it is also fighting against I citizen different parts the country so to some extent you'll be. Copied to CB US and Turkey. Going after them but at the same time this brings Turkey much more into this fight Turkey has stayed away. From joining the US led coalition. In Turkey in Iraq rather and in Syria and so now that Turkey is involved in the fight the and the fact that they have. And they have expressed this. Strong desire to get rid of us ought. Big questions remain about how they're going to acts in that he. It. ABC's Alex my art with us from B route Alex thank you so much for your time. We can keep up with its story in real time by downloading the ABC news app and star in this story for exclusive updates on ago. This is international hot spot on ABC news digital analyst with her in New York.

This transcript has been automatically generated and may not be 100% accurate.