Strong explosions were heard early Sunday on the outskirts of the main rebel-held city in eastern Ukraine near the airport, raising new fears that a cease-fire signed two days ago is on the verge of collapse. Blasts powerful enough to be heard in downtown Donetsk came from the area near the airport, which has been under the control of government troops since May and has come under unremitting attacks from pro-Russia separatist rebels since then.
Developments in Ukraine - Sunday, Sept. 7
![Pro-Russian rebels sit in their car with a heavy machine gun in Donetsk, eastern Ukraine, Sept. 7, 2014.](https://gdb.voanews.com/6f7aad45-4102-4b47-995d-dc033e31a64f_w1024_q10_s.jpg)
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Pro-Russian rebels sit in their car with a heavy machine gun in Donetsk, eastern Ukraine, Sept. 7, 2014.
![A man walks past a house damaged by recent shelling on the outskirts of the southern coastal town of Mariupol, Ukraine, Sept. 7, 2014.](https://gdb.voanews.com/02ee7109-560a-4cae-a83a-b16bf7c16f04_cx0_cy6_cw0_w1024_q10_r1_s.jpg)
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A man walks past a house damaged by recent shelling on the outskirts of the southern coastal town of Mariupol, Ukraine, Sept. 7, 2014.
![Homes burn after being hit by a shell in Donetsk, eastern Ukraine, Sept. 7, 2014.](https://gdb.voanews.com/064a2e0e-c96b-4fbd-87e5-00b9a4e2d74b_cx0_cy9_cw0_w1024_q10_r1_s.jpg)
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Homes burn after being hit by a shell in Donetsk, eastern Ukraine, Sept. 7, 2014.
![A local woman puts out the fire at her burning house after shelling in Donetsk, eastern Ukraine, Sept. 7, 2014.](https://gdb.voanews.com/30f3caf4-f3f8-404f-836d-c5fb55892648_cx0_cy7_cw0_w1024_q10_r1_s.jpg)
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A local woman puts out the fire at her burning house after shelling in Donetsk, eastern Ukraine, Sept. 7, 2014.