DONETSK, Ukraine, Rajab 29, 1435, May 28, 2014, SPA -- Chechnya's regional leader said Wednesday that he hasn't sent any troops to fight alongside pro-Russia insurgents in eastern Ukraine, but he says some Chechens may have gone there on their own, AP reported. In a statement posted on his Instagram, Ramzan Kadyrov said two-thirds of three million Chechens live outside the province in Russia's North Caucasus mountains, so he "can't and mustn't know where each of them goes." Fighters who looked like residents of the Caucasus were seen among pro-Russia rebels in eastern Ukraine, where they have seized government buildings and fought with Ukrainian forces. Ukraine and the West have accused Moscow of fomenting the unrest, but it has denied the claim. In the most ferocious battle yet, rebels in Donetsk tried to take control of its airport Monday, but were repelled by Ukrainian forces using combat jets and helicopter gunships and lost dozens of men. Some insurgents said up to 100 may have been killed. The city remained tense Wednesday, with Ukrainian fighter jets flying overhead. Some gunshots were heard. --SPA 13:36 LOCAL TIME 10:36 GMT www.spa.gov.sa/w