Fighting in Eastern Ukraine intensifies

1. Ukrainian forces have been battling Pro-Russian rebels.
2. The rebels have weapons and vehicles from Russia.
3. The US now says that 1,000 Russian troops are in Ukraine.
4. Moscow denies the allegations.
5. NATO claims to have satellite images of troop movement.
6. Fighting intensified on Thursday on two fronts.
7. Russian troops captured towns in Southeastern Ukraine.